PUMA publications for /user/b_schwederski/lumazine%20crystalhttps://puma.ub.uni-stuttgart.de/user/b_schwederski/lumazine%20crystalPUMA RSS feed for /user/b_schwederski/lumazine%20crystal2024-03-29T10:09:38+01:00Organometallic rhodium(III) and -(I) complexes with 1,3-dimethyllumazine (DML). The crystal structure of (h2-(O4,N5)-DML)(h5-C5Me5)ClRh(PF6)https://puma.ub.uni-stuttgart.de/bibtex/2cd9e31148e30ff465a33418814db8f05/b_schwederskib_schwederski2019-07-15T13:41:23+02:00cation;mol cation;redn chem crystal dimethyllumazine electrochem lumazine rhodium structure <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Oliver Heilmann" itemprop="url" href="/person/125b5926dcb3e31f426c35110f501a11d/author/0"><span itemprop="name">O. Heilmann</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Hans Dieter Hausen" itemprop="url" href="/person/125b5926dcb3e31f426c35110f501a11d/author/1"><span itemprop="name">H. Hausen</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/125b5926dcb3e31f426c35110f501a11d/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">Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">49 </span></span>(<span itemprop="issueNumber">11</span>):
<span itemprop="pagination">1554--1560</span></em> </span>(<em><span>1994<meta content="1994" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences111554--1560Organometallic rhodium(III) and -(I) complexes with 1,3-dimethyllumazine (DML). The crystal structure of [(\textgreek{h}2-(O4,N5)-DML)(\textgreek{h}5-C5Me5)ClRh](PF6)491994cation;mol cation;redn chem crystal dimethyllumazine electrochem lumazine rhodium structure The crystal structure detn. of the new Rh(III)-complex [(DML)(C5Me5)ClRh](PF6), (I) DML = 1,3-dimethyllumazine, reveals O4,N5 coordination of the metal to DML with not very different bond lengths of 213.0(2) pm (Rh-N) and 219.2(2) pm (Rh-O). This result stands in contrast to the previously reported structure of a cationic dihydrobiopterin bound to [Mo(O)Cl3]- which exhibited a very unsym. chelate arrangement. Chem. and electrochem. two-electron redn. of the Rh(III) complex led to a very labile Rh(I) species (DML)(C5Me5)Rh which is distinguished by an intense charge transfer band in the visible range. The results confirm the characterization of DML as a weak \textgreek{s} donor/\textgreek{p} acceptor ligand with a rather low-lying \textgreek{p}* orbital. [on SciFinder(R)]Rhenium(I) coordinated lumazine and pterin derivatives: Structure and spectroelectrochemistry of reversibly reducible (6-ATML)Re(CO)3Cl (6-ATML = 6-acetyl-1,3,7-trimethyllumazine)https://puma.ub.uni-stuttgart.de/bibtex/29d1d5ace9c37acec637aa2fb080e20e3/b_schwederskib_schwederski2019-07-15T13:41:23+02:00IR acetyltrimethyllumazine carbonyl chloro chloro;ESR chloro;IR chloro;lumazine chloro;rhenium crystal lumazine prepn;pterin prepn;redn prepn;spectroelectrochem pterin rev rhenium spectroelectrochem structure substituted <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Sonia B. Jimenez-Pulido" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/0"><span itemprop="name">S. Jimenez-Pulido</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Monika Sieger" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/1"><span itemprop="name">M. Sieger</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Axel Knodler" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/2"><span itemprop="name">A. Knodler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Oliver Heilmann" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/3"><span itemprop="name">O. Heilmann</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Matthias Wanner" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/4"><span itemprop="name">M. Wanner</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Brigitte Schwederski" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/5"><span itemprop="name">B. Schwederski</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Jan Fiedler" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/6"><span itemprop="name">J. Fiedler</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Miguel N. Moreno-Carretero" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/author/7"><span itemprop="name">M. Moreno-Carretero</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang. Kaim" itemprop="url" href="/person/1820506a28d4855ed047ab29acd380e79/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">Inorganica Chimica Acta</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">325 </span></span>(<span itemprop="issueNumber">1,2</span>):
<span itemprop="pagination">65--72</span></em> </span>(<em><span>2001<meta content="2001" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganica Chimica Acta1,265--72Rhenium(I) coordinated lumazine and pterin derivatives: Structure and spectroelectrochemistry of reversibly reducible (6-ATML)Re(CO)3Cl (6-ATML = 6-acetyl-1,3,7-trimethyllumazine)3252001IR acetyltrimethyllumazine carbonyl chloro chloro;ESR chloro;IR chloro;lumazine chloro;rhenium crystal lumazine prepn;pterin prepn;redn prepn;spectroelectrochem pterin rev rhenium spectroelectrochem structure substituted A no. of complexes between substituted lumazines (2,4-dioxo-(1H,3H)pteridines) or pterins (2-amino-4-oxo-(3H)pteridines) and Re(CO)3Cl were synthesized and characterized electrochem. and spectroscopically. The structure of the (6-ATML)Re(CO)3Cl deriv. (6-ATML = 6-acetyl-1,3,7-trimethyllumazine) was detd. as [fac-(6-ATML)Re(CO)3Cl]ยท3C6H6. The Re(I) center coordinates in a rather sym. fashion through the O4-N5 \textgreek{a}-carbonylimino chelate site of 6-ATML; the potentially available acetyl function is not involved in the metal coordination. The acetyl acceptor substituent facilitates the reversible 1-electron redn. of this compd. to a persistent anion radical complex [(6-ATML)Re(CO)3Cl]-, which is accompanied by variable low-frequency shifts of the six carbonyl stretching bands and by the appearance of a broad EPR signal. [on SciFinder(R)]