@article{Szesni2006Inter-13802,
  year={2006},
  doi={10.1021/om0607301},
  title={Intermetallic Communication through Carbon Wires in Heterobinuclear Cationic Allenylidene Complexes of Chromium},
  number={24},
  volume={25},
  issn={0276-7333},
  journal={Organometallics},
  pages={5774--5787},
  author={Szesni, Normen and Drexler, Matthias and Maurer, Jörg and Winter, Rainer F. and Montigny, Frédéric de and Lapinte, Claude and Steffens, Stefan and Heck, Jürgen and Weibert, Bernhard and Fischer, Helmut}
}

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    <dc:contributor>Szesni, Normen</dc:contributor>
    <dc:contributor>Heck, Jürgen</dc:contributor>
    <dc:creator>Maurer, Jörg</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-06-22T08:13:25Z</dc:date>
    <dc:contributor>Drexler, Matthias</dc:contributor>
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    <dc:creator>Weibert, Bernhard</dc:creator>
    <dc:creator>Fischer, Helmut</dc:creator>
    <dcterms:abstract xml:lang="eng">The reaction of [(CO)5M(THF)] (M = Cr, W) with lithiated 2-ethynylquinoline followed by alkylation of the resulting alkynylpentacarbonylmetalate with [R3O]BF4 (R = Me, Et) gives allenylidene complexes in which the terminal carbon atom of the allenylidene chain is part of an N-alkylated quinoline ring. The reaction of [(CO)5M(THF)] (M = Cr, W) with lithiated 2-ethynylpyridine derivatives, Li[CCC5H4BrN], and [Et3O]BF4 affords allenylidene complexes that contain a terminal six-membered N-heterocycle brominated at the 5- or 6-position. Various alkynyl groups can be introduced into the 5-position of the ring through [PdCl2(PPh3)2]-catalyzed coupling of the 5-bromo-substituted allenylidene complexes with the terminal alkynes HCCR‘ (R‘ = TMS, Ph, C10H21, 4-C6H4-CCPh, 4-C6H4-CCH, Fc (Fc = (C5H4)FeCp), 4-C6H4-CCFc, 4-C6H4-CCC6H4CCFc). The analogous replacement reaction of the 6-bromo-substituted chromium complex with HCCFc yields the corresponding 6-ferrocenylalkynyl-substituted complex. Desilylation of (6a) gives (15a). CuI-catalyzed coupling of 15a with {M}−Br ({M} = Ru(CO)2Cp, Fe(CO)2Cp*) affords the binuclear complexes The symmetrical binuclear complex is formed by oxidative coupling of 15a with [Cu(OAc)2]. The attachment of a ferrocenyl group to the chromium center via PPh2 to give is achieved via displacement of a cis-CO ligand in by PPh2Fc. On addition of Co2(CO)8 to a Co2(CO)6 unit adds to the CC bond to form a trinuclear complex. The ferrocenyl unit in (R = Fc, C6H4CCFc, C6H4CCC6H4CCFc) is readily oxidized. Spectroelectrochemical studies (IR, UV/vis) confirm that in the oxidized form there is strong electronic communication of the ferrocenyl group with the (CO)5Cr unit.</dcterms:abstract>
    <dc:creator>Drexler, Matthias</dc:creator>
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    <dcterms:title>Intermetallic Communication through Carbon Wires in Heterobinuclear Cationic Allenylidene Complexes of Chromium</dcterms:title>
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    <dc:creator>Winter, Rainer F.</dc:creator>
    <dc:contributor>Steffens, Stefan</dc:contributor>
    <dc:language>eng</dc:language>
    <dc:creator>Steffens, Stefan</dc:creator>
    <dc:creator>Lapinte, Claude</dc:creator>
    <dcterms:bibliographicCitation>First publ. in: Organometallics 25 (2006), 24, pp. 5774-5787</dcterms:bibliographicCitation>
    <dcterms:issued>2006</dcterms:issued>
    <dc:rights>terms-of-use</dc:rights>
    <dc:creator>Montigny, Frédéric de</dc:creator>
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    <dc:contributor>Maurer, Jörg</dc:contributor>
    <dc:contributor>Montigny, Frédéric de</dc:contributor>
    <dc:contributor>Winter, Rainer F.</dc:contributor>
    <dc:contributor>Lapinte, Claude</dc:contributor>
    <dc:contributor>Weibert, Bernhard</dc:contributor>
    <dc:creator>Heck, Jürgen</dc:creator>
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