Cluster Build-up Reactions using Di-gold Cationic Fragments: Synthesis and Structural Characterization of [Os7(CO)19(Au2dppm)]

Zareen Ahkter, Andrew J. Edwards, Scott L. Ingham, Jack Lewis, Ana M. Martin Castro, Paul R. Raithby, Gregory P. Shields

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14 Citations (SciVal)

Abstract

The reaction of the di-gold cation [Au2(dppx)]2+ with the heptanuclear cluster dianion [Os7(CO)20]2- affords the mixed metal cluster [Os7(CO)20{Au2 (dppx)}] (x = m (1), e (2), b (3)). On standing, in solution, this complex undergoes decarbonylation to give the cluster [Os7(CO)19{Au2(dppx)}] (x = m (4), e (5), b (6)). The complexes have been characterised spectroscopically, and an X-ray structure determination of the dppm derivative shows that it contains a metal core based on an Os7 edge-bridged bicapped tetrahedron with the two μ3-Au atoms capping adjacent triangular Os3 faces of the central tetrahedron. In an analogous reaction, the carbido anion [Os7(H)C(CO)19]- affords the neutral cluster [Os7C(CO)19{Au2(dppm)}] (7) when treated with [Au2(dppm)]2+ in the presence of base.

Original languageEnglish
Pages (from-to)217-226
Number of pages10
JournalJournal of Cluster Science
Volume11
Issue number1
DOIs
Publication statusPublished - 2000

Funding

We gratefully acknowledge the Engineering and Physical Science Research Council (EPSRC) (S.L.I.), the Cambridge Commonwealth Trust and the UK Committee of Vice Chancellors and Principals (Z.A.), the Cambridge Crystallographic Data Centre (G.P.S.) for financial support. A.M.M.C. wishes to thank the Spanish Ministry of Education and the British Council for a grant and for study leave. We thank Johnson Matthey for the loan of heavy metal salts.

Keywords

  • Carbonyl
  • Cluster
  • Crystal structure
  • Gold
  • Heteronuclear
  • Osmium
  • Phosphine

ASJC Scopus subject areas

  • Biochemistry
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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