PUMA publications for /user/b_schwederski/complex;magnetic%20electron%20uvhttps://puma.ub.uni-stuttgart.de/user/b_schwederski/complex;magnetic%20electron%20uvPUMA RSS feed for /user/b_schwederski/complex;magnetic%20electron%20uv2024-03-28T18:32:53+01:00Ground state electron transfer between TCNE and one or more 16-electron species containing vanadium, osmium, ruthenium or cobalthttps://puma.ub.uni-stuttgart.de/bibtex/24d129055e8c8edfe8de235a00850986c/b_schwederskib_schwederski2019-07-15T13:41:23+02:00TCNE UV cobalt complex;IR complex;electron complex;magnetic complex;osmium electron ground metal property state transfer transfer;electrochem transfer;ruthenium transfer;vanadium <span data-person-type="author" class="authorEditorList "><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Frank Baumann" itemprop="url" href="/person/17e0c6ce13896ea30f73750d2c41a793a/author/0"><span itemprop="name">F. Baumann</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Martina Heilmann" itemprop="url" href="/person/17e0c6ce13896ea30f73750d2c41a793a/author/1"><span itemprop="name">M. Heilmann</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Walther Matheis" itemprop="url" href="/person/17e0c6ce13896ea30f73750d2c41a793a/author/2"><span itemprop="name">W. Matheis</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Andreas Schulz" itemprop="url" href="/person/17e0c6ce13896ea30f73750d2c41a793a/author/3"><span itemprop="name">A. Schulz</span></a></span>, </span><span><span itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author"><a title="Wolfgang Kaim" itemprop="url" href="/person/17e0c6ce13896ea30f73750d2c41a793a/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="Jeanne. Jordanov" itemprop="url" href="/person/17e0c6ce13896ea30f73750d2c41a793a/author/5"><span itemprop="name">J. Jordanov</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">251 </span></span>(<span itemprop="issueNumber">1-2</span>):
<span itemprop="pagination">239--248</span></em> </span>(<em><span>1996<meta content="1996" itemprop="datePublished"/></span></em>)</span>Mon Jul 15 13:41:23 CEST 2019Inorganica Chimica Acta1-2239--248Ground state electron transfer between TCNE and one or more 16-electron species containing vanadium, osmium, ruthenium or cobalt2511996TCNE UV cobalt complex;IR complex;electron complex;magnetic complex;osmium electron ground metal property state transfer transfer;electrochem transfer;ruthenium transfer;vanadium The reactions between tetracyanoethene (TCNE) and organometallic 16 valence electron fragments from the early, middle and late transition series such as V(C5R5)2Br (R = H, Me), M(PiPr3)2(CO)(H)Cl (M = Os, Ru) or Co(C5H5)(CO) (with Co(C5H5)(CO)2 as precursor) yield complexes which exhibit rather different electronic structures as evident from electrochem., IR and UV-visible absorption spectroscopy, and magnetic susceptibility measurements. With V(C5R5)2Br, the resulting compds. are VIV(C5R5)2Br(TCNE-I) and [VIV(C5R5)2Br]2(TCNE-II); for R = Me, the nonconjugated dinuclear complex exhibits magnetically weakly coupled d1 centers and nitrile stretching bands which are very similar to those of the room temp. magnet [V(TCNE)x]·yCH2Cl2 and of structurally characterized [IrI(PPh3)2(CO)]2(TCNE-II). In contrast to this spectroscopic and magnetic evidence for two consecutive metal-to-TCNE electron transfers, the reaction of TCNE with M(PiPr3)2(CO)(H)Cl (M = Ru, Os) involves an electron transfer process only for the 1st metal coordination step. Di- and tetranuclear [Os(PiPr3)2(CO)(H)Cl]2,4(TCNE) show a similar behavior to the recently reported organomanganese and pentaammineruthenium compds. with corresponding d electron configurations. Attempts are made to correlate spectroscopic results with the structurally detd. \textgreek{p} conjugation and the extent of metal-to-ligand electron transfer in the ground state. Three different kinds of electron configurations in dinuclear systems of \textgreek{m},\textgreek{h}1:\textgreek{h}1-TCNEn- are thus described: nonconjugated d1-(TCNE2-)-d1 (V) and d8-(TCNE2-)-d8 (Ir) and conjugated d6-(TCNE·-)-d5 (Os, Mn). In contrast, the 16-electron species Co(C5H5)(CO) probably binds to reduced TCNE only once and in a side-on fashion. [on SciFinder(R)]