PUMA publications for /user/b_schwederski/complex;quinoxalinehttps://puma.ub.uni-stuttgart.de/user/b_schwederski/complex;quinoxalinePUMA RSS feed for /user/b_schwederski/complex;quinoxaline2024-03-28T15:45:09+01:002-Heteroatom-1,3-diazoles and quinoxaline as bridging p-acceptor ligands for Group VIB metal carbonyl fragments M(CO)5 (M = Cr, Mo, W). Synthesis, electrochemistry, absorption and emission spectroscopyhttps://puma.ub.uni-stuttgart.de/bibtex/2f4d1a9bb83f927f31ed652370f78e63e/b_schwederskib_schwederski2019-07-15T13:41:23+02:00Group VIB carbonyl chalcogenadiazole chalcogenadiazole;selenadiazole chromium complex complex;Group complex;oxadiazole complex;quinoxaline complex;redn complex;thiadiazole complex;tungsten potential quinoxaline;molybdenum tungsten <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/1a0e5ceb623890f399b7b52fdfe7371e9/author/0"><span itemprop="name">W. Kaim</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Stephan Kohlmann" itemprop="url" href="/person/1a0e5ceb623890f399b7b52fdfe7371e9/author/1"><span itemprop="name">S. Kohlmann</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Alistair J. Lees" itemprop="url" href="/person/1a0e5ceb623890f399b7b52fdfe7371e9/author/2"><span itemprop="name">A. Lees</span></a></span>, </span> and <span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Mthembeni. Zulu" itemprop="url" href="/person/1a0e5ceb623890f399b7b52fdfe7371e9/author/3"><span itemprop="name">M. Zulu</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> </span>(<em><span>1989<meta content="1989" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Zeitschrift fuer Anorganische und Allgemeine Chemie97--1142-Heteroatom-1,3-diazoles and quinoxaline as bridging \textgreek{p}-acceptor ligands for Group VIB metal carbonyl fragments M(CO)5 (M = Cr, Mo, W). Synthesis, electrochemistry, absorption and emission spectroscopy5751989Group VIB carbonyl chalcogenadiazole chalcogenadiazole;selenadiazole chromium complex complex;Group complex;oxadiazole complex;quinoxaline complex;redn complex;thiadiazole complex;tungsten potential quinoxaline;molybdenum tungsten M(CO)5L (M = Cr, Mo, W; L = 2,1,3-benzoxadiazole (bod), 2,1,3-benzothiadiazole (btd), 2,1,3-benzoselenadiazole (bsd)), [M1(CO)5]2L1 (M1 = Cr, W; L1 = bod, btd, bsd, quinoxaline, 2,1,3-thiadiazole) were prepd. and characterized by cyclic voltammetry, UV-visible adsorption and emission spectroscopy. The complexes exhibit low-lying metal-to-ligand charge transfer (MLCT, d $\rightarrow$ \textgreek{p}*) transitions as evident from long wavelength absorptions and are easily reduced to yield persistent anion radicals. [W(CO)5]2L1 (L1 = btd, bsd) show weak near IR ({\textgreater}750 nm) emission from rather short-lived MLCT excited states. While quinoxaline and monocyclic 2,1,3-thiadiazole also form binuclear W(CO)5 complexes, the related 2-methyl-1,2,3-benzotriazole does not bind W(CO)5 fragments in the neutral state but only as the more basic anion radical as evident from ESR spectroscopy. [on SciFinder(R)]Coordination chemistry of reduced nitrogen heterocycles. Dinuclear pentacarbonyl complexes of molybdenum and tungsten with paramagnetic bridging ligandshttps://puma.ub.uni-stuttgart.de/bibtex/22f0d0147d4e2159f97c78c032964ce27/b_schwederskib_schwederski2019-07-15T13:41:23+02:00binuclear carbonyl complex nitrogen tungsten bipyridine complex;carbonyl complex;molybdenum complex;pyrazine complex;quinoxaline complex;tungsten heterocycle heterocycle;dipyridylethene heterocycle;phenazine molybdenum <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/10785748fa5efd399aa907c27c01e83ad/author/0"><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">Chemische Berichte</span>, </em> <em><span itemtype="http://schema.org/PublicationVolume" itemscope="itemscope" itemprop="isPartOf"><span itemprop="volumeNumber">115 </span></span>(<span itemprop="issueNumber">3</span>):
<span itemprop="pagination">910--918</span></em> </span>(<em><span>1982<meta content="1982" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Chemische Berichte3910--918Coordination chemistry of reduced nitrogen heterocycles. Dinuclear pentacarbonyl complexes of molybdenum and tungsten with paramagnetic bridging ligands1151982binuclear carbonyl complex nitrogen tungsten bipyridine complex;carbonyl complex;molybdenum complex;pyrazine complex;quinoxaline complex;tungsten heterocycle heterocycle;dipyridylethene heterocycle;phenazine molybdenum L[M(CO)5]2- (M = Mo, W; L = pyrazine, 2,5-dimethylpyrazine, quinoxaline, phenazine, 4,4'-bipyridine, (E)-1,2-di-4-pyridylethene) were prepd. by reaction of M(CO)6 with the radical anions of the heterocycles L in THF or dimethoxyethane. The metal carbonyl coordination was established by high resoln. ESR which also provided data on the spin distribution and on the conformation of the radical complexes. [on SciFinder(R)]