PUMA publications for /user/b_schwederski/bridgedhttps://puma.ub.uni-stuttgart.de/user/b_schwederski/bridgedPUMA RSS feed for /user/b_schwederski/bridged2024-03-29T10:46:21+01:00The conjugative bridging of organometallic reaction centers in heterodinuclear complexes (OC)3ClRe(m-L)MCl(C5Me5)+, M = Rh or Ir - Spectroscopic consequences of reductive activationhttps://puma.ub.uni-stuttgart.de/bibtex/2fd5463166a06bf4a5f23cc0750009b79/b_schwederskib_schwederski2019-07-15T13:41:23+02:00ESR IR UV arom bis bridged chelate chelate;redox chelate;rhenium compd complex complex;spectroelectrochem conjugated electrochem half heterobinuclear heterocyclic iridium ligand;rhodium nitrogen potential prepn;pyrazine prepn;redn pyrimidine rhenium rhodium sandwich tetrazole <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/192aa14ea83b3c7ab8303e2b1f266d0c1/author/0"><span itemprop="name">W. Kaim</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Thomas Scheiring" itemprop="url" href="/person/192aa14ea83b3c7ab8303e2b1f266d0c1/author/1"><span itemprop="name">T. Scheiring</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Michael Weber" itemprop="url" href="/person/192aa14ea83b3c7ab8303e2b1f266d0c1/author/2"><span itemprop="name">M. Weber</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan. Fiedler" itemprop="url" href="/person/192aa14ea83b3c7ab8303e2b1f266d0c1/author/3"><span itemprop="name">J. Fiedler</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Zeitschrift fuer Anorganische und Allgemeine Chemie</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">630 </span></span>(<span itemprop="issueNumber">12</span>):
<span itemprop="pagination">1883--1893</span></em> </span>(<em><span>2004<meta content="2004" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Zeitschrift fuer Anorganische und Allgemeine Chemie121883--1893The conjugative bridging of organometallic reaction centers in heterodinuclear complexes [(OC)3ClRe(\textgreek{m}-L)MCl(C5Me5)]+, M = Rh or Ir - Spectroscopic consequences of reductive activation6302004ESR IR UV arom bis bridged chelate chelate;redox chelate;rhenium compd complex complex;spectroelectrochem conjugated electrochem half heterobinuclear heterocyclic iridium ligand;rhodium nitrogen potential prepn;pyrazine prepn;redn pyrimidine rhenium rhodium sandwich tetrazole Heterobimetallic rhenium-rhodium and rhenium-iridium organometallic complexes bridged by conjugated bis-chelate nitrogen heterocyclic ligands, were prepd.; their electroredn. gives corresponding radical-anions, which were studied by ESR and IR spectroscopy. Complexes (I-III) [as PF6- salts; M = (\textgreek{h}5-C5Me5)RhCl, (\textgreek{h}5-C5Me5)IrCl] were prepd. by complexation of corresponding rhenium complexes Re(CO)3Cl(bpip), Re(CO)3Cl(bptz) and Re(CO)3Cl(bpym) (bpip, bptz, bpym are for 2,5-bis(1-phenyliminoethyl)pyrazine, 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine and 2,2'-bipyrimidine, resp.) with [(\textgreek{h}5-C5Me5)MCl]2. The stepwise reductive activation accompanied by chloride dissocn. was studied by cyclic voltammetry and spectroelectrochem. in the range of CO stretching vibrations (IR), charge transfer absorptions (UV/Vis) and ESR for paramagnetic intermediates of the mono- and heterobinuclear compds. While complexes of bpip and bptz form one-electron reduced radical intermediates [(OC)3ClRe(\textgreek{m}-L)MCl(C5Me5)].bul., the compds. with bpym follow MCl-dissociative two-electron redn. pathway, giving [(OC)3ClRe(\textgreek{m}-L)M(C5Me5)]. [on SciFinder(R)]The triruthenium complex (acac)2RuII3(L) containing a conjugated diquinoxaline2,3-f:2',3'-hphenazine (L) bridge and acetylacetonate (acac) as ancillary ligands. Synthesis, spectroelectrochemical and EPR investigationhttps://puma.ub.uni-stuttgart.de/bibtex/243954b1296c97f9a9fefff2eaab77ef2/b_schwederskib_schwederski2019-07-15T13:41:23+02:00acetylacetonato acetylacetonato;EPR bridged diquinoxalinephenazine electrochem prepn redox redox;ruthenium ruthenium spectroelectrochem;UV trinuclear visible <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Srikanta Patra" itemprop="url" href="/person/1d1e11e12f640011bd9015d5fd6100843/author/0"><span itemprop="name">S. Patra</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Biprajit Sarkar" itemprop="url" href="/person/1d1e11e12f640011bd9015d5fd6100843/author/1"><span itemprop="name">B. Sarkar</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Sandeep Ghumaan" itemprop="url" href="/person/1d1e11e12f640011bd9015d5fd6100843/author/2"><span itemprop="name">S. Ghumaan</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/1d1e11e12f640011bd9015d5fd6100843/author/3"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/1d1e11e12f640011bd9015d5fd6100843/author/4"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Goutam Kumar. Lahiri" itemprop="url" href="/person/1d1e11e12f640011bd9015d5fd6100843/author/5"><span itemprop="name">G. Lahiri</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Dalton Transactions</span>, </em> </span>(<em><span>2004<meta content="2004" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Dalton Transactions5754--758The triruthenium complex [{(acac)2RuII}3(L)] containing a conjugated diquinoxaline[2,3-f:2',3'-h]phenazine (L) bridge and acetylacetonate (acac) as ancillary ligands. Synthesis, spectroelectrochemical and EPR investigation2004acetylacetonato acetylacetonato;EPR bridged diquinoxalinephenazine electrochem prepn redox redox;ruthenium ruthenium spectroelectrochem;UV trinuclear visible Triruthenium complex [{(acac)2Ru}3(L)] (1, L = diquinoxaline[2,3-f:2',3'-h]phenazine) is prepd. and undergoes three well-sepd. 1-electron oxidn. and redn. processes. The EPR results indicate electron removal from the Ru(II) centers on oxidn. and the occupation of a largely L-based MO on redn. In spite of well-sepd. (\textgreek{D}E $\geq$ 340 mV) oxidn., no obvious intervalence charge transfer bands were detected in the visible, NIR or IR regions, suggesting very weak electronic coupling between the metal centers in the mixed-valent intermediates 1+ and 12+. The sepd. (\textgreek{D}E $\geq$ 540 mV) stepwise redn. produces weak near-IR features assocd. with partially occupied \textgreek{p}* orbitals of L. The unusually high g anisotropy in the EPR spectrum of 1- is attributed to the occupation of a degenerate MO by the unpaired electron. [on SciFinder(R)]Molecule-Bridged Mixed-Valent Intermediates Involving the RuI Oxidation Statehttps://puma.ub.uni-stuttgart.de/bibtex/29f99aa99299b5413b3d79ed4b99a3e16/b_schwederskib_schwederski2019-07-15T13:41:23+02:00UV arene areneruthenium azobispyridine bridged charge complex complex;redox complex;ruthenium dimer;EPR dimer;cyclic diruthenium iminomethylpyrazine mixed potential prepn spectra transfer transition valence voltammetry <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Biprajit Sarkar" itemprop="url" href="/person/161c9e4c8a6fd65f897db460b152b8ee1/author/0"><span itemprop="name">B. Sarkar</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/161c9e4c8a6fd65f897db460b152b8ee1/author/1"><span itemprop="name">W. Kaim</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/161c9e4c8a6fd65f897db460b152b8ee1/author/2"><span itemprop="name">J. Fiedler</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Carole. Duboc" itemprop="url" href="/person/161c9e4c8a6fd65f897db460b152b8ee1/author/3"><span itemprop="name">C. Duboc</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of the American Chemical Society</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">126 </span></span>(<span itemprop="issueNumber">45</span>):
<span itemprop="pagination">14706--14707</span></em> </span>(<em><span>2004<meta content="2004" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Journal of the American Chemical Society4514706--14707Molecule-Bridged Mixed-Valent Intermediates Involving the RuI Oxidation State1262004UV arene areneruthenium azobispyridine bridged charge complex complex;redox complex;ruthenium dimer;EPR dimer;cyclic diruthenium iminomethylpyrazine mixed potential prepn spectra transfer transition valence voltammetry Binuclear diruthenium cymene complexes bridged by azobis(pyridine) and pyrazine-bis-imine ligands are prepd. and studied by cyclic voltammetry. The diruthenium(II) complexes [(\textgreek{m}-L)[RuCl(\textgreek{h}6-MeC6H4iPr-4)]2](PF6)n, (1, L = 2,2'-azobispyridine (abpy), n = 1; 2, L = 2,5-bis(1-phenyliminoethyl)pyrazine (bpip), n = 2) were prepd. and characterized by NMR and EPR spectroscopy. Whereas the complex 1 has the structure of radical-anion-bridged RuIIRuII complex, the three-electron redn. under loss of both chloride ions produces the ions [(\textgreek{m}-L)[Ru(Cym)]2]+, which could be identified as RuI(4d7)-contg. mixed-valent species (Ru0RuI or RuIRuII) by its intervalence charge-transfer bands around 1500 nm in UV-vis-NIR spectroelectrochem. and EPR, which shows rhombic g tensor anisotropy. The weak metal-metal interaction of the d\textgreek{s} electrons from the eg set is responsible for the small electrochem. coupling with comproportionation consts. Kc $\approx$ 102. [on SciFinder(R)]Self-Assembly of Heterobimetallic Neutral Macrocycles Incorporating Ferrocene Spacer Groups: Spectroelectrochemical Analysis of the Double Two-Electron Oxidation of a Molecular Rectanglehttps://puma.ub.uni-stuttgart.de/bibtex/2668a950df08312f29e72cd082de69bce/b_schwederskib_schwederski2019-07-15T13:41:23+02:00anthracenediyl bridged complex;heterobimetallic crystal electrochem ferrocene macrocycle multinuclear neutral oxidn;phenanthrenediyl platinum platinyl prepn redox spacer spectroelectrochem structure <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Neeladri Das" itemprop="url" href="/person/1447187c7491df0aa855775850da7ab6a/author/0"><span itemprop="name">N. Das</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Atta M. Arif" itemprop="url" href="/person/1447187c7491df0aa855775850da7ab6a/author/1"><span itemprop="name">A. Arif</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Peter J. Stang" itemprop="url" href="/person/1447187c7491df0aa855775850da7ab6a/author/2"><span itemprop="name">P. Stang</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Monika Sieger" itemprop="url" href="/person/1447187c7491df0aa855775850da7ab6a/author/3"><span itemprop="name">M. Sieger</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Biprajit Sarkar" itemprop="url" href="/person/1447187c7491df0aa855775850da7ab6a/author/4"><span itemprop="name">B. Sarkar</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/1447187c7491df0aa855775850da7ab6a/author/5"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan. Fiedler" itemprop="url" href="/person/1447187c7491df0aa855775850da7ab6a/author/6"><span itemprop="name">J. Fiedler</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganic Chemistry</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">44 </span></span>(<span itemprop="issueNumber">16</span>):
<span itemprop="pagination">5798--5804</span></em> </span>(<em><span>2005<meta content="2005" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganic Chemistry165798--5804Self-Assembly of Heterobimetallic Neutral Macrocycles Incorporating Ferrocene Spacer Groups: Spectroelectrochemical Analysis of the Double Two-Electron Oxidation of a Molecular Rectangle442005anthracenediyl bridged complex;heterobimetallic crystal electrochem ferrocene macrocycle multinuclear neutral oxidn;phenanthrenediyl platinum platinyl prepn redox spacer spectroelectrochem structure Two Pt4-Fe2 mixed-metal neutral assemblies, incorporating four bis(triethylphosphine)platinum(II) centers, two flexible bridging 1,1'-ferrocenedicarboxylates, and two rigid 2,9-phenanthrenediyl (4) or 1,8-anthracenediyl (5) bridges, have been synthesized. X-ray characterization of 4 and 5 reveals the formation of discrete and highly sym. heterobimetallic neutral species possessing a rhomboidal and rectangular shape, resp. The rectangular mols., 5, could be reversibly oxidized in two two-electron steps, sepd. by 0.21 V. Spectroelectrochem. in the UV-vis-NIR region confirms the ferrocene groups as primary oxidn. sites; however, the intermediate 52+ is EPR silent even at 4 K due to enhanced EPR relaxation involving the oxidizable 1,8-anthracenediyl linkers. [on SciFinder(R)]Heterotetranuclear Complexes of Reduced and Non-reduced Bridging 1,2,4,5-Tetrazine Ligands with 1,1'-Bis(diphenylphosphanyl)-ferrocene-copper(I)https://puma.ub.uni-stuttgart.de/bibtex/2fc103f80405ffdd9ce408016052dae7c/b_schwederskib_schwederski2019-07-15T13:41:23+02:00bispyrazinyltetrazine bispyridyltetrazine bridge bridged complex complex;cyclic copper dppf electrochem prepn redn;bispyridyltetrazine redn;crystal structure voltammetry <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Monika Bach" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/0"><span itemprop="name">M. Bach</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Sayak Roy" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/1"><span itemprop="name">S. Roy</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Biprajit Sarkar" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/2"><span itemprop="name">B. Sarkar</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Martina Bubrin" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/3"><span itemprop="name">M. Bubrin</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mark Niemeyer" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/4"><span itemprop="name">M. Niemeyer</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/5"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Carole Duboc" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/6"><span itemprop="name">C. Duboc</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/11e1190237049aed5bdd394805361473a/author/7"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Zeitschrift fuer Anorganische und Allgemeine Chemie</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">641 </span></span>(<span itemprop="issueNumber">2</span>):
<span itemprop="pagination">327--331</span></em> </span>(<em><span>2015<meta content="2015" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Zeitschrift fuer Anorganische und Allgemeine Chemie2327--331Heterotetranuclear Complexes of Reduced and Non-reduced Bridging 1,2,4,5-Tetrazine Ligands with 1,1'-Bis(diphenylphosphanyl)-ferrocene-copper(I)6412015bispyrazinyltetrazine bispyridyltetrazine bridge bridged complex complex;cyclic copper dppf electrochem prepn redn;bispyridyltetrazine redn;crystal structure voltammetry Complexes {(μ-bptz)[Cu(dppf)]2}(BF4)2 [(1)(BF4)2] [bptz = 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine, dppf = 1,1'-bis(diphenylphosphino)ferrocene] and {(μ-bpztz)[Cu(dppf)]2}(PF6)2 [(2)(PF6)2] [bpztz = 3,6-bis(2-pyrazinyl)-1,2,4,5-tetrazine] contain two redox-active heterodinuclear FeIICuI moieties, bridged by a redox-active ligand. A crystal structure detn. of (1)(BF4)2·4CH2Cl2 confirms the nonreduced arom. nature of the bridge, in contrast to previous results on dicopper(I) complexes of bptz. Facile 1-electron redn. produces the radical complexes {(μ-bptz)[Cu(dppf)]2}+ (1+) and {(μ-bpztz)[Cu(dppf)]2}+ (2+), which could be isolated [as (1)(BF4)] and studied by variable frequency EPR to provide hyperfine (9.5 GHz) and g anisotropy information (285 GHz). Cyclic voltammetry and UV/visible/NIR spectroelectrochem. indicate a reversible two-electron oxidn. of the well sepd. ($\sim$13.4 {\AA}) ferrocene termini. [on SciFinder(R)]Valence delocalization in a strongly coupled (Kc = 1014) molecule-bridged cyanodiiron(III,II) specieshttps://puma.ub.uni-stuttgart.de/bibtex/2e35895f55884670990e74fa3a9b462f5/b_schwederskib_schwederski2019-07-15T13:41:23+02:00bridged bridged;iron bridged;valence comproportionation const cyano delocalization dinuclear iron prepn;mixed pyrimidyltetrazine valent <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Michael Ketterle" itemprop="url" href="/person/180a2fbbd02da89e13047bfc3079601c1/author/0"><span itemprop="name">M. Ketterle</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/180a2fbbd02da89e13047bfc3079601c1/author/1"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan. Fiedler" itemprop="url" href="/person/180a2fbbd02da89e13047bfc3079601c1/author/2"><span itemprop="name">J. Fiedler</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Chemical Communications (Cambridge, United Kingdom)</span>, </em> </span>(<em><span>1998<meta content="1998" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Chemical Communications (Cambridge, United Kingdom)161701--1702Valence delocalization in a strongly coupled (Kc = 1014) molecule-bridged cyanodiiron(III,II) species1998bridged bridged;iron bridged;valence comproportionation const cyano delocalization dinuclear iron prepn;mixed pyrimidyltetrazine valent A hybrid between the Prussian Blue and Creutz-Taube mixed valent species is presented as the newly prepd. bmtz-bridged bis[tetracyanoiron(+2.5)] complex (13-) [bmtz = 3,6-bis(2-pyrimidyl)-1,2,4,5-tetrazine] which exhibits a very large comproportionation const. of 1014 and a delocalized structure, according to UV-visible-NIR-IR spectroelectrochem. in MeCN soln. [on SciFinder(R)]An exceedingly stable diiron(II,III) complex ion (tz)Fe(CN)525- with comproportionation constants between 108 (in H2O) and 1019 (in CH3CN)https://puma.ub.uni-stuttgart.de/bibtex/219eff9786842857c46e2956da75dd506/b_schwederskib_schwederski2019-07-15T13:41:23+02:00bridged comproportionation decacyano diiron iron pentacyano prepn stability;iron stability;tetrazine tetrazine valence valence;mixed valent <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Markus Glockle" itemprop="url" href="/person/1268906ceaae305bbb237b0a878d7e9c4/author/0"><span itemprop="name">M. Glockle</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/1268906ceaae305bbb237b0a878d7e9c4/author/1"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Angewandte Chemie, International Edition</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">38 </span></span>(<span itemprop="issueNumber">20</span>):
<span itemprop="pagination">3072--3074</span></em> </span>(<em><span>1999<meta content="1999" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Angewandte Chemie, International Edition203072--3074An exceedingly stable diiron(II,III) complex ion [(tz){Fe(CN)5}2]5- with comproportionation constants between 108 (in H2O) and 1019 (in CH3CN)381999bridged comproportionation decacyano diiron iron pentacyano prepn stability;iron stability;tetrazine tetrazine valence valence;mixed valent (NEt4)6[(NC)5FeLFe(CN)5] (1; L = 1,2,4,5-tetrazine) and (NEt4)5[(NC)5FeLFe(CN)5] (2) were prepd. The mixed valent 2 was exceedingly stable as indicated by the solvent dependent comproportionation consts. of 1. ESR, IR and UV-visible spectra are reported for 2. The use of the tetrazine bridge increases the stability remarkably compared to the pyrazine bridged analog. [on SciFinder(R)]A tetrakis(amidinato)dichromium complex with a \dqsupershort\dq chromium-chromium quadruple bondhttps://puma.ub.uni-stuttgart.de/bibtex/25c472139453c9d32b3e8e2f530ff2e87/b_schwederskib_schwederski2019-07-15T13:41:23+02:00amidinato axial bond bridged chromium complex ligand;chromium <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Avi Bino" itemprop="url" href="/person/13693a78af3f760f14373d8776191d9cc/author/0"><span itemprop="name">A. Bino</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="F. Albert Cotton" itemprop="url" href="/person/13693a78af3f760f14373d8776191d9cc/author/1"><span itemprop="name">F. Cotton</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/13693a78af3f760f14373d8776191d9cc/author/2"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganic Chemistry</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">18 </span></span>(<span itemprop="issueNumber">12</span>):
<span itemprop="pagination">3566--3568</span></em> </span>(<em><span>1979<meta content="1979" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganic Chemistry123566--3568A tetrakis(amidinato)dichromium complex with a {\dq}supershort{\dq} chromium-chromium quadruple bond181979amidinato axial bond bridged chromium complex ligand;chromium A tetrakis(amidinato)dichromium compd. was for the first time prepd. in the form of crystals suitable for structure detn., and the structure was solved and refined by x-ray crystallog. The amidinato ligand used was [MeNCPhNMe]-. The complex crystallizes in space group P1̅, with a 9.770(2), b 11.717(2), c 9.620(2){\AA}, and \textgreek{a} 113.93(2), \textgreek{b} 104.48(2), \textgreek{g} 101.30(2)°; V 918(1){\AA} and Z = 1. The Cr2(MeNCPhNMe)4 mol. has virtual D4h symmetry and there is no axial coordination since the 4 Me groups on each end screen the axial positions very effectively. The Cr-Cr distance is 1.843(2){\AA}, making this one of the shorter of the {\dq}supershort{\dq} Cr-Cr quadruple bonds. This structure thus provides further evidence that the long Cr-Cr distances found in all Cr2(O2CR)4 and Cr2(O2CR)4L2 compds. are primarily the result of axial coordination. [on SciFinder(R)]Analysis of Redox Series of Unsymmetrical 1,4-Diamido-9,10-anthraquinone-Bridged Diruthenium Compoundshttps://puma.ub.uni-stuttgart.de/bibtex/210a7ec1ce460c7d38fc8afca0f6b70a8/b_schwederskib_schwederski2019-07-15T13:41:23+02:00ancillary bridged complex complex;cyclic complex;unsym crystal diamidoanthraquinone dinuclear diruthenium effect ligand prepn ruthenium spectroelectrochem structure unsym voltammetry <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Abhishek Mandal" itemprop="url" href="/person/1b4e7f94b1c360e9f1155fd41ab150206/author/0"><span itemprop="name">A. Mandal</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Md Asmaul Hoque" itemprop="url" href="/person/1b4e7f94b1c360e9f1155fd41ab150206/author/1"><span itemprop="name">M. Hoque</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Anita Grupp" itemprop="url" href="/person/1b4e7f94b1c360e9f1155fd41ab150206/author/2"><span itemprop="name">A. Grupp</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alexa Paretzki" itemprop="url" href="/person/1b4e7f94b1c360e9f1155fd41ab150206/author/3"><span itemprop="name">A. Paretzki</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/1b4e7f94b1c360e9f1155fd41ab150206/author/4"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Goutam Kumar. Lahiri" itemprop="url" href="/person/1b4e7f94b1c360e9f1155fd41ab150206/author/5"><span itemprop="name">G. Lahiri</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganic Chemistry</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">55 </span></span>(<span itemprop="issueNumber">5</span>):
<span itemprop="pagination">2146--2156</span></em> </span>(<em><span>2016<meta content="2016" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganic Chemistry52146--2156Analysis of Redox Series of Unsymmetrical 1,4-Diamido-9,10-anthraquinone-Bridged Diruthenium Compounds552016ancillary bridged complex complex;cyclic complex;unsym crystal diamidoanthraquinone dinuclear diruthenium effect ligand prepn ruthenium spectroelectrochem structure unsym voltammetry The unsym. diruthenium complexes [(bpy)2RuII(\textgreek{m}-H2L2-)RuIII(acac)2]ClO4 ([3]ClO4), [(pap)2RuII(\textgreek{m}-H2L2-)RuIII(acac)2]ClO4 ([4]ClO4), and [(bpy)2RuII(\textgreek{m}-H2L2-)RuII(pap)2](ClO4)2 ([5](ClO4)2) were obtained by way of the mononuclear precursors [(bpy)2RuII(H3L-)]ClO4 ([1]ClO4) and [(pap)2RuII(H3L-)]ClO4 ([2]ClO4) (bpy = 2,2'-bipyridine, pap = 2-phenylazopyridine, acac- = 2,4-pentanedionate, and H4L = 1,4-diamino-9,10-anthraquinone). Structural characterization by single-crystal x-ray diffraction and magnetic resonance (NMR, EPR) were used to establish the oxidn. state situation in each of the isolated materials. Cyclic voltammetry, EPR, and UV-visible-near-IR (UV-visible-NIR) spectroelectrochem. were used to analyze the multielectron transfer series of the potentially class I mixed-valent dinuclear compds., considering the redox activities of differently coordinated metals, of the noninnocent bridge and of the terminal ligands. Comparison with sym. analogs [L'2Ru(\textgreek{m}-H2L)RuL'2]n (L' = bpy, pap, or acac-) shows that the redox processes in the unsym. dinuclear compds. are not averaged, with respect to the corresponding sym. systems, because of intramol. charge rearrangements involving the metals, the noninnocent bridge, and the ancillary ligands. [on SciFinder(R)]Valence Delocalization despite Weak Metal-Metal Coupling in a Bis(organoosmium(III,II)) Complex with a Pyrazine Bridgehttps://puma.ub.uni-stuttgart.de/bibtex/20d01fac4d94e4cf3b665bacaa9a7d77a/b_schwederskib_schwederski2019-07-15T13:41:23+02:00bridged complex complex;mixed complex;osmium delocalization;spectroelectrochem dinuclear electrochem osmium oxidn prepn pyrazine valence <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Markus Gloeckle" itemprop="url" href="/person/19be7c5bab07080bb3df97b131144d3f5/author/0"><span itemprop="name">M. Gloeckle</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/19be7c5bab07080bb3df97b131144d3f5/author/1"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan. Fiedler" itemprop="url" href="/person/19be7c5bab07080bb3df97b131144d3f5/author/2"><span itemprop="name">J. Fiedler</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Organometallics</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">17 </span></span>(<span itemprop="issueNumber">23</span>):
<span itemprop="pagination">4923--4925</span></em> </span>(<em><span>1998<meta content="1998" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Organometallics234923--4925Valence Delocalization despite Weak Metal-Metal Coupling in a Bis(organoosmium(III,II)) Complex with a Pyrazine Bridge171998bridged complex complex;mixed complex;osmium delocalization;spectroelectrochem dinuclear electrochem osmium oxidn prepn pyrazine valence Carbonyl vibrational spectroelectrochem. of {(μ-pz)[Os(PiPr3)2(CO)(H)Cl]2}0/+ in dichloromethane reveals valence delocalization of the mixed-valent state despite relatively weak metal-metal coupling, as evident from the comproportionation const. Kc = 104.3 and the intervalence charge-transfer band at 1705 nm (\textgreek{e} = 1250 M-1 cm-1, \textgreek{Dn}1/2 = 3700 cm-1). The rather low charge and nonpolar medium, i.e., the absence of valence trapping by counterions or solvent mols., favor this particular situation. [on SciFinder(R)]Configurational selectivity in benzyldimethylarsine complexes of palladium(II) and platinum(II): Synthesis, spectroscopy and structureshttps://puma.ub.uni-stuttgart.de/bibtex/207a2f3ef6fa31097e3b66e2af5ebf7b0/b_schwederskib_schwederski2019-07-15T13:41:23+02:00NMR;cis acetato benzyldimethylarsine benzyldimethylarsine;crystal bridged chloro cis correlation dinuclear halo isomer mononuclear palladium platinum prepn pyrazolato structure trans trans;platinum <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Prasad P. Phadnis" itemprop="url" href="/person/184a828c84e707709202dc089040c0615/author/0"><span itemprop="name">P. Phadnis</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Vimal K. Jain" itemprop="url" href="/person/184a828c84e707709202dc089040c0615/author/1"><span itemprop="name">V. Jain</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Axel Klein" itemprop="url" href="/person/184a828c84e707709202dc089040c0615/author/2"><span itemprop="name">A. Klein</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Michael Weber" itemprop="url" href="/person/184a828c84e707709202dc089040c0615/author/3"><span itemprop="name">M. Weber</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/184a828c84e707709202dc089040c0615/author/4"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganica Chimica Acta</span>, </em> </span>(<em><span>2003<meta content="2003" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganica Chimica Acta119--128Configurational selectivity in benzyldimethylarsine complexes of palladium(II) and platinum(II): Synthesis, spectroscopy and structures3462003NMR;cis acetato benzyldimethylarsine benzyldimethylarsine;crystal bridged chloro cis correlation dinuclear halo isomer mononuclear palladium platinum prepn pyrazolato structure trans trans;platinum Benzyldimethylarsine complexes of Pd(II) and Pt(II) [MX2(BzAsMe2)2] (X = Cl, Br, I), [M2Cl2(\textgreek{m}-Cl)2(BzAsMe2)2], [Pd2Cl2(\textgreek{m}-OAc)2(BzAsMe2)2], [Pd2Me2(\textgreek{m}-Cl)2(BzAsMe2)2] and [Pd2X2(\textgreek{m}-N-N)2(BzAsMe2)2] (M = Pd or Pt; N-N = pyrazolate (pz) or 3,5-dimethylpyrazolate (dmpz)) were prepd. All complexes were characterized by elemental anal., IR, UV-visible absorption and NMR (1H, 13C, 195Pt) spectroscopy. The mol. structures of [MX2(BzAsMe2)2] (M = Pt or Pd; X = Cl, Br or I) were established by NMR spectroscopy and single crystal x-ray diffraction anal. and reveal a clear dichotomy in soln. and in the solid between the compds. with X = Cl in a cis configuration and the trans configured bromide and iodide complexes. [on SciFinder(R)]Binuclear rhodium(III) and iridium(III) monoselenocarboxylates: Synthesis, spectroscopy and structure of an ortho-metalated iridium complex featuring an IrCCC(m-Se) chelate ringhttps://puma.ub.uni-stuttgart.de/bibtex/2ee9bdb2bde10fd4d1578a16aa8fa3190/b_schwederskib_schwederski2019-07-15T13:41:23+02:00binuclear bridged complex complex;rhodium crystal iridium metalated monoselenocarboxylate ortho phenylcarboselenolate prepn prepn;mol structure <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Liladhar B. Kumbhare" itemprop="url" href="/person/1f94f77c9e40d915f6e8bf5ba432aafca/author/0"><span itemprop="name">L. Kumbhare</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Amey P. Wadawale" itemprop="url" href="/person/1f94f77c9e40d915f6e8bf5ba432aafca/author/1"><span itemprop="name">A. Wadawale</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Vimal K. Jain" itemprop="url" href="/person/1f94f77c9e40d915f6e8bf5ba432aafca/author/2"><span itemprop="name">V. Jain</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Monika Sieger" itemprop="url" href="/person/1f94f77c9e40d915f6e8bf5ba432aafca/author/3"><span itemprop="name">M. Sieger</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/1f94f77c9e40d915f6e8bf5ba432aafca/author/4"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganic Chemistry Communications</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">13 </span></span>(<span itemprop="issueNumber">4</span>):
<span itemprop="pagination">475--478</span></em> </span>(<em><span>2010<meta content="2010" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganic Chemistry Communications4475--478Binuclear rhodium(III) and iridium(III) monoselenocarboxylates: Synthesis, spectroscopy and structure of an ortho-metalated iridium complex featuring an IrCCC(\textgreek{m}-Se) chelate ring132010binuclear bridged complex complex;rhodium crystal iridium metalated monoselenocarboxylate ortho phenylcarboselenolate prepn prepn;mol structure Monoselenocarboxylate-bridged binuclear complexes of RhIII and IrIII, [(Cp*MCl)2(\textgreek{m}-SeCOAr)2] (M = Rh or Ir; Cp* = pentamethylcyclopentadienyl; Ar = Ph, C6H4Me-4), have been isolated either by the reaction between [Cp*2M2(\textgreek{m}-Cl)2Cl2] with KSeCOAr in acetonitrile or by treatment of [Cp*MCl(solvent)2][PF6] with KSeCOAr in acetone. The novel binuclear complexes, [Cp*IrCl(\textgreek{m}-SeCOAr)(\textgreek{k}2-SeCOC6H3R-)IrCp*] (R = H or Me-4) with ortho-metalation at one of the iridium centers have been isolated following the use of excess AgPF6. The single crystal structure of [Cp*IrCl(\textgreek{m}-SeCOC6H5)(\textgreek{k}2-SeCOC6H4-)IrCp*] exhibits two phenylcarboselenolate moieties situated in syn fashion with respect to the {\dq}Ir2Se2{\dq} plane, one of which leans towards the metal center in order to undergo ortho-metalation after iridium-chlorine bond dissocn. [on SciFinder(R)]Multistep redox sequences of azopyridyl (L) bridged reaction centers in stable radical complex ions (μ-L)MCl(η5-C5Me5)2$\surd$+, M = Rh or Ir: Spectroelectrochemistry and high-frequency EPR spectroscopyhttps://puma.ub.uni-stuttgart.de/bibtex/22de3933d5230a5b44bd0410870c4d428/b_schwederskib_schwederski2019-07-15T13:41:23+02:00ESR azopyridyl azopyrimidine azopyrimidinyl bridged bridged;spectro cation cyclopentadienyl electrochem ion iridium pentamethylcyclopentadienyl prepn;radical radical rhodium <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Stephanie Frantz" itemprop="url" href="/person/157df72f98cf9262069d76c05bd5978e0/author/0"><span itemprop="name">S. Frantz</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ralf Reinhardt" itemprop="url" href="/person/157df72f98cf9262069d76c05bd5978e0/author/1"><span itemprop="name">R. Reinhardt</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Stefan Greulich" itemprop="url" href="/person/157df72f98cf9262069d76c05bd5978e0/author/2"><span itemprop="name">S. Greulich</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Matthias Wanner" itemprop="url" href="/person/157df72f98cf9262069d76c05bd5978e0/author/3"><span itemprop="name">M. Wanner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/157df72f98cf9262069d76c05bd5978e0/author/4"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Carole Duboc-Toia" itemprop="url" href="/person/157df72f98cf9262069d76c05bd5978e0/author/5"><span itemprop="name">C. Duboc-Toia</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/157df72f98cf9262069d76c05bd5978e0/author/6"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Dalton Transactions</span>, </em> </span>(<em><span>2003<meta content="2003" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Dalton Transactions173370--3375Multistep redox sequences of azopyridyl (L) bridged reaction centers in stable radical complex ions {(μ-L)[MCl(η5-C5Me5)]2}$\surd$+, M = Rh or Ir: Spectroelectrochemistry and high-frequency EPR spectroscopy2003ESR azopyridyl azopyrimidine azopyrimidinyl bridged bridged;spectro cation cyclopentadienyl electrochem ion iridium pentamethylcyclopentadienyl prepn;radical radical rhodium The dinuclear complex cations {(μ-L)[MCl(η5-C5Me5)]2}n, M = Rh or Ir and L = abpy (= 2,2'-azobispyridine) or abcp (= 2,2'-azobis(5-chloropyrimidine)), could be isolated as paramagnetic hexafluorophosphates (n = 1+) or, for M = Ir, as diamagnetic bis-hexafluorophosphates (n = 2+). In addn. to the reversible one-electron process as indicated by this convertibility there are two successive chloride-releasing redn. steps, sepd. by unusually large potential differences \textgreek{D}EEC between 0.75 V (Rh2/abpy) and 1.14 V (Ir2/abcp), leading to the spectroelectrochem. characterized complexes {[(η5-Me5C5)M](μ-L)[MCl(η5-C5Me5)]}+ and (\textgreek{m}-L)[M(\textgreek{h}5-C5Me5)]2. This large splitting of \textgreek{D}EEC establishes the capability of azopyridyl bridges for mediating efficient metal-metal communication beyond mere electron transfer. The neutral complexes (\textgreek{m}-L)[M(\textgreek{h}5-C5Me5)]2 are distinguished by a series of intense absorption bands in the near IR, the lowest absorption energies being displayed by the Ir2/abcp combination. The stable electron reservoir intermediates {(μ-L)[MCl(η5-C5Me5)]2}+ were identified as complexes of L.- anion radicals via their small g anisotropy as measured through high-frequency ({\textgreater}200 GHz) EPR spectroscopy. [on SciFinder(R)]A radical-bridged bis(ferrocenylcopper(I)) complex: Structural identity, multifrequency EPR, and spectroelectrochemistryhttps://puma.ub.uni-stuttgart.de/bibtex/25a8724c4a991e4c8a08b0ee3499b32c3/b_schwederskib_schwederski2019-07-15T13:41:23+02:00azodicarboxylate bridged complex complex;dicopper complex;spectroelectrochem crystal dicopper diphosphinoferrocene prepn radical structure structure;electrochem <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Sayak Roy" itemprop="url" href="/person/11e80210d86a40af62c6b538ff9a37945/author/0"><span itemprop="name">S. Roy</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Monika Sieger" itemprop="url" href="/person/11e80210d86a40af62c6b538ff9a37945/author/1"><span itemprop="name">M. Sieger</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Priti Singh" itemprop="url" href="/person/11e80210d86a40af62c6b538ff9a37945/author/2"><span itemprop="name">P. Singh</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mark Niemeyer" itemprop="url" href="/person/11e80210d86a40af62c6b538ff9a37945/author/3"><span itemprop="name">M. Niemeyer</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/11e80210d86a40af62c6b538ff9a37945/author/4"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Carole Duboc" itemprop="url" href="/person/11e80210d86a40af62c6b538ff9a37945/author/5"><span itemprop="name">C. Duboc</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/11e80210d86a40af62c6b538ff9a37945/author/6"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganica Chimica Acta</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">361 </span></span>(<span itemprop="issueNumber">6</span>):
<span itemprop="pagination">1699--1704</span></em> </span>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganica Chimica Acta61699--1704A radical-bridged bis(ferrocenylcopper(I)) complex: Structural identity, multifrequency EPR, and spectroelectrochemistry3612008azodicarboxylate bridged complex complex;dicopper complex;spectroelectrochem crystal dicopper diphosphinoferrocene prepn radical structure structure;electrochem The paramagnetic blue complex {(μ-adcOtBu)[Cu(dppf)]2}(PF6) contains two heterodinuclear 1,1'-bis(diphenylphosphinoferrocene)copper(I) moieties, bridged by the radical anion of di-tert-butylazodicarboxylic ester (adcOtBu). The assignment of oxidn. states is supported by crystal structure detn. and by variable frequency EPR spectroscopy which provides hyperfine (9.5 GHz) and g anisotropy information (285 GHz). Cyclic voltammetry and UV/visible/NIR spectroelectrochem. indicate reversible 1-electron oxidn. of the adcOtBu·- bridge prior to the quasi-reversible two-electron oxidn. of the well sepd. (12.55 {\AA}) ferrocene termini. One-electron redn. to the adcOtBu2- bridged system occurs with concomitant loss of the long-wavelength metal-to-ligand charge transfer absorption. [on SciFinder(R)]Correspondence of RuIIIRuII and RuIVRuIII Mixed Valent States in a Small Dinuclear Complexhttps://puma.ub.uni-stuttgart.de/bibtex/22da67271dafd3b07a984aec21ddb3721/b_schwederskib_schwederski2019-07-15T13:41:23+02:00acac bridged crystal cyclic dinuclear dinuclear;ruthenium electronic mixed oxamidato prepn ruthenium structure structure;spectroelectrochem valent voltammetry <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hemlata Agarwala" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/0"><span itemprop="name">H. Agarwala</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Thomas Michael Scherer" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/1"><span itemprop="name">T. Scherer</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Somnath Maji" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/2"><span itemprop="name">S. Maji</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Tapan Kumar Mondal" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/3"><span itemprop="name">T. Mondal</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Shaikh M. Mobin" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/4"><span itemprop="name">S. Mobin</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/5"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Francisco A. Urbanos" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/6"><span itemprop="name">F. Urbanos</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Reyes Jimenez-Aparicio" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/7"><span itemprop="name">R. Jimenez-Aparicio</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/8"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Goutam Kumar. Lahiri" itemprop="url" href="/person/1e0d6af10b3f84f6f9f062b39865a8a32/author/9"><span itemprop="name">G. Lahiri</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Chemistry - A European Journal</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">18 </span></span>(<span itemprop="issueNumber">18</span>):
<span itemprop="pagination">5667-5675, S5667/1-S5667/21</span></em> </span>(<em><span>2012<meta content="2012" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Chemistry - A European Journal185667-5675, S5667/1-S5667/21Correspondence of RuIIIRuII and RuIVRuIII Mixed Valent States in a Small Dinuclear Complex182012acac bridged crystal cyclic dinuclear dinuclear;ruthenium electronic mixed oxamidato prepn ruthenium structure structure;spectroelectrochem valent voltammetry The diruthenium(III) compd. [(\textgreek{m}-oxa){Ru(acac)2}2] [1, oxa2- = oxamidato(2-), acac- = 2,4-pentanedionato] exhibits an S = 1 ground state with antiferromagnetic spin-spin coupling (J = -40 cm-1). The mol. structure in the crystal of 1·2C7H8 revealed an intramol. metal-metal distance of 5.433 {\AA} and a notable asymmetry within the bridging ligand. Cyclic voltammetry and spectroelectrochem. (EPR, UV/visible/NIR) of the two-step redn. and of the two-step oxidn. (irreversible 2nd step) produced monocation and monoanion intermediates (Kc = 105.9) with broad NIR absorption bands (\textgreek{e} $\sim$2000 -1 cm-1) and maxima at 1800 (1-) and 1500 nm (1+). TD-DFT calcns. support a RuIIIRuII formulation for 1- with a doublet ground state. The 1+ ion (RuIVRuIII) was calcd. with an S = 3/2 ground state and the doublet state higher in energy (\textgreek{D}E = 694.6 cm-1). The Mulliken spin d. calcns. showed little participation of the ligand bridge in the spin accommodation for all paramagnetic species [(\textgreek{m}-oxa){Ru(acac)2}2]n, n = +1, 0, -1, and, accordingly, the NIR absorptions were identified as metal-to-metal (intervalence) charge transfers. Whereas only one such NIR band was obsd. for the RuIIIRuII (4d5/4d6) system 1-, the RuIVRuIII (4d4/4d5) form 1+ exhibited extended absorbance over the UV/visible/NIR range. [on SciFinder(R)]Intramolecular Valence and Spin Interaction in meso and rac Diastereomers of a p-Quinonoid-Bridged Diruthenium Complexhttps://puma.ub.uni-stuttgart.de/bibtex/289b19fd7a76a922fdd0bc07279361251/b_schwederskib_schwederski2019-07-15T13:41:23+02:00bridged crystal diastereoisomer diastereoisomer;electrochem diastereoisomer;magnetic diastereoisomer;quinonoid diruthenium interaction intramol prepn property quinonoid redox spin structure valence <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Doyel Kumbhakar" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/0"><span itemprop="name">D. Kumbhakar</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Biprajit Sarkar" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/1"><span itemprop="name">B. Sarkar</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Somnath Maji" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/2"><span itemprop="name">S. Maji</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Shaikh M. Mobin" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/3"><span itemprop="name">S. Mobin</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/4"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Francisco A. Urbanos" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/5"><span itemprop="name">F. Urbanos</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Reyes Jimenez-Aparicio" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/6"><span itemprop="name">R. Jimenez-Aparicio</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/7"><span itemprop="name">W. Kaim</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Goutam Kumar. Lahiri" itemprop="url" href="/person/115998996ed2c6b29c422c00feac95214/author/8"><span itemprop="name">G. Lahiri</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Journal of the American Chemical Society</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">130 </span></span>(<span itemprop="issueNumber">51</span>):
<span itemprop="pagination">17575--17583</span></em> </span>(<em><span>2008<meta content="2008" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Journal of the American Chemical Society5117575--17583Intramolecular Valence and Spin Interaction in meso and rac Diastereomers of a p-Quinonoid-Bridged Diruthenium Complex1302008bridged crystal diastereoisomer diastereoisomer;electrochem diastereoisomer;magnetic diastereoisomer;quinonoid diruthenium interaction intramol prepn property quinonoid redox spin structure valence The complexes meso- and rac-[(acac)2Ru(\textgreek{m}-L)Ru(acac)2]n, 1 and 2, where L2- = 1,4-dioxido-2,3-bis(3,5-dimethylpyrazol-1-yl)benzene and acac- = 2,4-pentanedionato, were characterized structurally, magnetically, electrochem., and spectroscopically as well as spectroelectrochem. (UV-visible-NIR, EPR) in the accessible redox states (n = 0, +, -, 2-). Due to steric interference, the neutral compds. contain a severely twisted L2- bridging ligand with 43-48° dihedral angles between the planes of the hydroquinone dianion and those of the ortho positioned pyrazolyl substituents. The difference between meso and rac isomers is rather pronounced in terms of the redox potentials (easier oxidn. and redn. of the rac form 2) and with respect to the absorption spectra of the oxidized states. Susceptibility and EPR measurements confirm the {RuIII(μ-L2-)RuIII} configuration of the neutral species, showing J values of -37 and -21 cm-1 for the spin-spin interaction between the $\sim$7.75 {\AA} sepd. metal centers in 1 and 2, resp. Two-step redn. involves the metals and produces RuIIIRuII mixed-valent monoanions with comproportionation consts. of $\sim$104, with RuIII-type EPR signals, and with broad intervalence charge transfer bands at $\sim$1200-1500 nm absorption max., suggesting localized valence (class II). Oxidn. produces intense near-IR absorption at 892 (1+) or 1027 nm (2+) and narrow isotropic EPR spectra at g $\approx$ 2.005, signifying unprecedented spin localization at the p-semiquinone bridge. These results are not compatible with an (L2-)-bridged {RuIVRuIII} situation nor with an {RuIII(μ-L·-)RuIII} three-spin arrangement with up-down-up spin configuration in the ground state, which would result in metal-centered spin through antiferromagnetic coupling between the adjacent individual spins. Only the {RuIII(μ-L·-)RuIII} situation, with up-up-down spin configuration, leads to ligand-centered resulting spin through the strong antiferromagnetic coupling between the remote metal spins, an unusual situation which is favored here because of weakened metal-radical coupling resulting from the pyrazolyl/p-semiquinone twist. [on SciFinder(R)]Chemistry of C-Trimethylsilyl-Substituted Heterocarboranes. 30. Synthetic and Structural Studies on Oxide Ion Encapsulating Tetralanthanide Tetrahedra Surrounded by \dqCarbons Apart\dq C2B4-Carborane Ligands (Ln(III) = La, Nd, Gd, Tb, Ho, Lu)https://puma.ub.uni-stuttgart.de/bibtex/24e8856a367a74c1427382a3f7817ccdc/b_schwederskib_schwederski2019-07-15T13:41:23+02:00bridged carborane complex dicarbahexaborane lanthanide oxo prepn prepn;crystal prepn;mol structure tetramer <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jianhui Wang" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/0"><span itemprop="name">J. Wang</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Shoujian Li" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/1"><span itemprop="name">S. Li</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Chong Zheng" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/2"><span itemprop="name">C. Zheng</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Ang Li" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/3"><span itemprop="name">A. Li</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Narayan S. Hosmane" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/4"><span itemprop="name">N. Hosmane</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="John A. Maguire" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/5"><span itemprop="name">J. Maguire</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Herbert W. Roesky" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/6"><span itemprop="name">H. Roesky</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Christopher C. Cummins" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/7"><span itemprop="name">C. Cummins</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/1b6c9ce601ed1614dfd0332db235d2430/author/8"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Organometallics</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">23 </span></span>(<span itemprop="issueNumber">20</span>):
<span itemprop="pagination">4621--4629</span></em> </span>(<em><span>2004<meta content="2004" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Organometallics204621--4629Chemistry of C-Trimethylsilyl-Substituted Heterocarboranes. 30. Synthetic and Structural Studies on Oxide Ion Encapsulating Tetralanthanide Tetrahedra Surrounded by {\dq}Carbons Apart{\dq} C2B4-Carborane Ligands (Ln(III) = La, Nd, Gd, Tb, Ho, Lu)232004bridged carborane complex dicarbahexaborane lanthanide oxo prepn prepn;crystal prepn;mol structure tetramer Tetrameric \textgreek{m}4-oxo-bridged lanthanadicarbaheptaboranes were prepd. and characterized. The reactions of closo-exo-5,6-Na(THF)2-1-Na(THF)2-2,4-(SiMe3)2-2,4-C2B4H4 (1) with anhyd. LnCl3 (Ln = La, Nd, Gd, Tb, Ho, Lu) and freshly distd. H2O in molar ratios of 5:4:1 gave cryst. solids, identified as the new oxolanthanacarboranes [[\textgreek{h}5-1-Ln(THF)n-2,4-(SiMe3)2-2,4-C2B4H4]4(\textgreek{m}-Cl)2(\textgreek{m}4-O)]·yTHF (y = 0, 1; 2 Ln = La, n = 0; 3 Ln = Nd, n = 1; 4 Ln = Gd, n = 0; 5 Ln = Tb, n = 1; 6 Ln = Ho, n = 0; 7 Ln = Lu, n = 1), in 73-86{\%} yields. All new compds. were characterized by IR spectroscopy and elemental analyses. While the diamagnetic compds. 2 and 7 were also studied by 1H, 13C, and 11B NMR spectroscopy, the lanthanacarboranes 3 and 5-7 were further characterized by single-crystal x-ray diffraction analyses. The species 3, 5, and 7 were found to be isostructural, all contg. oxide ion encapsulating tetralanthanide cores, Ln(\textgreek{m}4-O), that are stabilized by coordinating two carborane ligands: one in an \textgreek{h}5 fashion via the C2B3-bonding face and the other via two Ln-H-B bridges to a neighboring cage. Complexes 3 and 5-7 crystd. in the monoclinic space group C2/c with a = 23.748(5), 23.577(5), 28.403(5), and 23.544(5) {\AA}, b = 18.632(5), 18.513(5), 12.835(2), and 18.440(5) {\AA}, c = 22.798(5), 22.602(5), 27.879(5), and 22.480(5) {\AA}, \textgreek{b} = 104.338(5), 104.092(5), 117.820(3), and 104.153(5)°, and V = 9774(64), 9568(4), 8989(13), and 9464(4) {\AA}3, resp. (Z = 4). The final refinements of 3 and 5-7 converged at R1 = 0.0795, 0.0703, 0.0367, and 0.0904; wR2 =0.1793, 0.1686, 0.794, and 0.1844, and GOF = 1.401, 1.305, 1.446, and 1.498, resp. The room-temp. magnetic susceptibility of the holmium compd. 6 was found to be 10.3 \textgreek{m}B per lanthanide metal. [on SciFinder(R)]The redox pair (μ4-TCNE)Fe(CO)2(C5H5)44+/3+: Surprisingly small metal-ligand interaction and the first resolved EPR hyperfine structure (13C, 14N, 57Fe) of a tetranuclear complex with TCNE-https://puma.ub.uni-stuttgart.de/bibtex/222db58ce315068c38f86edfd8ce05c54/b_schwederskib_schwederski2019-07-15T13:41:23+02:00MLCT band bridged charge complex complex;EPR complex;metal complex;redox complex;tetracyanoethylene coordinated coupling cyclopentadienyl cyclopentadienyliron dicarbonyl hyperfine interaction iron ligand nitrogen potential prepn spectrum tetracyanoethylene tetranuclear transfer <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Amarendra Nath Maity" itemprop="url" href="/person/1132d692434e4e528b48e0f0b2b2a9ff5/author/0"><span itemprop="name">A. Maity</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Brigitte Schwederski" itemprop="url" href="/person/1132d692434e4e528b48e0f0b2b2a9ff5/author/1"><span itemprop="name">B. Schwederski</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/1132d692434e4e528b48e0f0b2b2a9ff5/author/2"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganic Chemistry Communications</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">8 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">600--602</span></em> </span>(<em><span>2005<meta content="2005" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganic Chemistry Communications7600--602The redox pair {(μ4-TCNE)[Fe(CO)2(C5H5)]4}4+/3+: Surprisingly small metal-ligand interaction and the first resolved EPR hyperfine structure (13C, 14N, 57Fe) of a tetranuclear complex with TCNE-82005MLCT band bridged charge complex complex;EPR complex;metal complex;redox complex;tetracyanoethylene coordinated coupling cyclopentadienyl cyclopentadienyliron dicarbonyl hyperfine interaction iron ligand nitrogen potential prepn spectrum tetracyanoethylene tetranuclear transfer Complexation of tetracyanoethylene with dicarbonyl(cyclopentadienyl)iron moiety gave the title tetranuclear complex, [[CpFe(CO)2]4(\textgreek{m}4-\textgreek{h}1:\textgreek{h}1:\textgreek{h}1:\textgreek{h}1:-TCNE)][BF4]4 (1·[BF4]4; Cp = \textgreek{h}5-C5H5) with ligand coordination via its nitrile groups. Electrochem. and absorption spectroscopy (UV/Vis, IR) of the complex 1·[BF4]4 reveal only a small degree of metal-to-ligand \textgreek{p} back donation, in contrast to previously characterized compds. [(TCNE)(MLn)4]. Accordingly, the one-electron reduced [(\textgreek{m}4-TCNE)[CpFe(CO)2]4]3+ exhibits a very well resolved EPR spectrum at g = 1.9965 with detectable coupling of 0.055 mT for 57Fe in natural abundance from four coordinated [Fe(CO)2(C5H5)]+ groups. [on SciFinder(R)]Thiolato-bridged \dqLinear\dq trinuclear platinum complexes Pt3(m-SR)4(dppm)22+https://puma.ub.uni-stuttgart.de/bibtex/2b80ec568de1cb0962da6b4ee2b3f17c8/b_schwederskib_schwederski2019-07-15T13:41:23+02:00arylthiolate bridged crystal dinuclear linear methanediphosphine phenylphosphinomethane platinum prepn structure tolylthiolate trinuclear trinuclear;platinum <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Anshu Singhal" itemprop="url" href="/person/10d112e0d1754c02eefe00722b5aeed7f/author/0"><span itemprop="name">A. Singhal</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Vimal K. Jain" itemprop="url" href="/person/10d112e0d1754c02eefe00722b5aeed7f/author/1"><span itemprop="name">V. Jain</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Axel Klein" itemprop="url" href="/person/10d112e0d1754c02eefe00722b5aeed7f/author/2"><span itemprop="name">A. Klein</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mark Niemeyer" itemprop="url" href="/person/10d112e0d1754c02eefe00722b5aeed7f/author/3"><span itemprop="name">M. Niemeyer</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/10d112e0d1754c02eefe00722b5aeed7f/author/4"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganica Chimica Acta</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">357 </span></span>(<span itemprop="issueNumber">7</span>):
<span itemprop="pagination">2134--2142</span></em> </span>(<em><span>2004<meta content="2004" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganica Chimica Acta72134--2142Thiolato-bridged {\dq}Linear{\dq} trinuclear platinum complexes [Pt3(\textgreek{m}-SR)4(dppm)2]2+3572004arylthiolate bridged crystal dinuclear linear methanediphosphine phenylphosphinomethane platinum prepn structure tolylthiolate trinuclear trinuclear;platinum Thiolato-bridged tri- and dinuclear Pt complexes [Pt3(\textgreek{m}-SR)4(dppm)2]2+ (1) and [Pt2(\textgreek{m}-ER)2(dppm)2]2+ (2) (E = S or Se; R = Et or aryl; dppm = bis(diphenylphosphino)methane) were prepd. using the mononuclear precursors [Pt(ER)2(dppm)]. The complexes were characterized by NMR (1H, 13C, 31P, 195Pt), FTIR and FAB mass spectral data. The structure of [Pt3(\textgreek{m}-SC6H4CH3-4)4(dppm)2][CF3SO3]2·6CH2Cl2 (1d), was established through x-ray crystallog., revealing a zigzag arrangement of the three coordination spheres around the Pt atoms. [on SciFinder(R)]Two new amidato-bridged dimolybdenum(II) compounds: TetrakisN-(2,6-dimethylphenyl)formamidodimolybdenum bis(tetrahydrofuranate) and tetrakis(N-phenylpivalamido)dimolybdenumhttps://puma.ub.uni-stuttgart.de/bibtex/298c37d168de85c1e60d097a448549883/b_schwederskib_schwederski2019-07-15T13:41:23+02:00amidato bridged complex complex;pivalamido complex;structure formamido molybdenum <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="F. Albert Cotton" itemprop="url" href="/person/197dc85f1b621c6c5cd2b0bed80fcf311/author/0"><span itemprop="name">F. Cotton</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="William H. Ilsley" itemprop="url" href="/person/197dc85f1b621c6c5cd2b0bed80fcf311/author/1"><span itemprop="name">W. Ilsley</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/197dc85f1b621c6c5cd2b0bed80fcf311/author/2"><span itemprop="name">W. Kaim</span></a></span></span>. </span><span class="additional-entrytype-information"><span itemtype="http://schema.org/PublicationIssue" itemscope="itemscope" itemprop="isPartOf"><em><span itemprop="journal">Inorganic Chemistry</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">19 </span></span>(<span itemprop="issueNumber">12</span>):
<span itemprop="pagination">3586--3589</span></em> </span>(<em><span>1980<meta content="1980" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganic Chemistry123586--3589Two new amidato-bridged dimolybdenum(II) compounds: Tetrakis[N-(2,6-dimethylphenyl)formamido]dimolybdenum bis(tetrahydrofuranate) and tetrakis(N-phenylpivalamido)dimolybdenum191980amidato bridged complex complex;pivalamido complex;structure formamido molybdenum Two new amidato-bridged dimolybdenum compds., Mo2[(2,6-Me2C6H3)NCHO]4(ax-THF)2 (I) and Mo2[PhNCOCMe3]4 (II), were prepd. and their structures detd. The structure of I was solved in the monoclinic space group C2/c with a 11.892(2), b 25.274(3), c 14.668(1) {\AA}, \textgreek{b} 96.16(2)°, V = 4383(2) {\AA},3 and Z = 4. Each mol. resides on a crystallog. C2 axis that is colinear with the Mo-Mo bond. The two THF mols are axially coordinated. The Mo-O(THF) distance, 2.577(5) {\AA}, is the shortest that has been obsd. to date, and this may be related to the relatively long Mo-Mo distance, 2.113(1) {\AA}. The structure of II was solved in the triclinic space group P1̅ with a 11.254(3), b 11.751(2), c 9.531(4) {\AA}, \textgreek{a} 103.36(2)°, \textgreek{b} 113.00(3)°, \textgreek{g} 70.35(4)°, V = 1085(1) {\AA}3, and Z = 1. Each mol. resides on a center of inversion. Thus, the ligand arrangements in the two mols. are different, with the core arrangements being trans for I and cis for II. The Mo-Mo bond length in this compd., 2.070(1) {\AA}, is markedly shorter than that in I, while the other bond lengths within the cores of the two mols. are essentially the same. [on SciFinder(R)]