Approach to a metallacycling polymerization - reactions of [(η5-C5H5)Co(PPh3)2] with α,β-diynes and Me3SiCCC6H4C6H4CCSiMe3

Ta i. Shimura, Akira Ohkubo, Kunitsugu Aramaki, Hidehiro Uekusa, Toyoaki Fujita, Shigeru Ohba, Hiroshi Nishihara

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17 Citations (Scopus)


Reactions of [CpCo(PPh3)2](Cp=η5-cyclopentadienyl) with conjugated diacetylenes were investigated in terms of the synthesis of π-conjugated organometallic polymers. The reaction of an α,β-diyne, PhCCCCPh, gave three geometric isomers of dialkynylcobaltacyclopentadienes, 1a-c, and an insoluble polymeric product, 1d. A 2,4-dialkynyl complex, 2, and a 2,5-dialkynyl complex, 3, were obtained solely from Me3SiCCCCSiMe3 and MeCCCCMe, respectively. 1,1′-Bis(trimethylsilylethynyl)-4,4′-biphenyl afforded two isomers of 1,3-dialkynylcyclobutadiene complexes, 4a and 4b. The stability of the one-electron oxidized forms of the cobalacyclopentadiene and cyclobutadiene complexes was examined by cyclic voltammetry.

Original languageEnglish
Pages (from-to)215-218
Number of pages4
JournalInorganica Chimica Acta
Issue number1-2
Publication statusPublished - 1995 Mar 1


  • Cobaltacyclopentadiene complexes
  • Cyclic voltammetry
  • Cyclobutadiene complexes
  • Metallacycle complexes
  • Organometallic polymer complexes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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