The use of bis(diphenylphosphinoacetylene) and its digold derivative as linking groups in osmium cluster chemistry. Crystal structures of [{Os3(CO)11}2(dppa)], [Os3,(CO)10(dppa)]2and [Os4H(CO)12Au(dppa)]2(dppa Ph2PCCPPh2)

Angelo J. Amoroso, Brian F.G. Johnson, Jack Lewis, Anju D. Massey, Paul R. Raithby, Wing Tak Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

45 Citations (Scopus)


The reaction of the activated triosmium cluster, [Os3(CO)11(NCMe)] with bis(diphenylphosphinoacetylene) (dppa) at room temperature affords the linked cluster [{Os3(CO)112}(dppa)] (1), while the reaction of [Os3(CO)10(NCMe)2] with an excess of dppa affords the di-, tri- and tetrameric clusters [{Os3(CO)10(dppa)}2] (2), [{Os3(CO)10(dppa)}3] (3) and [{Os3(CO)10(dppa)}4] (4) in moderate yields. Similarly, the reaction of the anion [Os4H3(CO)12]-with Au2(dppa)Cl2, in the presence of excess Et3N and TIPF6, under reflux, in chloroform affords [{Os4H(CO)12Audppa}2] (5) as the only extractable product. Single crystal X-ray structural analyses of 1 and 2 show that the two triosmium cluster units are linked via coordination of one Os centre to each of the two phosphorus centres of the intact dppa ligand, while the structure of 5 shows the two tetraosmium units are linked via two μ2-bridging Au centres and terminal phosphorus centres of the two Au(dppa) ligands.
Original languageEnglish
Pages (from-to)219-231
Number of pages13
JournalJournal of Organometallic Chemistry
Issue number1-2
Publication statusPublished - 17 Nov 1992
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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