Synthesis, Characterization and Structural Properties of Some Heterobimetallic Carbonyl Clusters Derived from Diethynylsilane and Diethynyldisilane Ligands

Chun Kin Wong, Guo Liang Lu, Cheuk Lam HO, Wai Yeung WONG*, Zhenyang Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We report the synthesis of some heterobimetallic carbonyl clusters of groups 8 and 9 derived from diethynylsilane and diethynyldisilane ligands. The triosmium carbonyl clusters containing a pendant acetylene unit [(μ-CO)Os 3(CO) 932-HC≡C-E-C≡CH)] [E = Si(CH 3) 2, Si(CH 3) 2-Si(CH 3) 2 and SiPh 2] were prepared and subsequently used for mixed-metal cluster formation. New diyne complexes of the type [{(μ-CO)Os 3(CO) 9}{Co 2(CO) 6}(μ 322-diyne)] and [{(μ-CO)Os 3(CO) 9}{(μ-H)Ru 3(CO) 9}(μ 3232, η 2-diyne)] [diyne = HC≡CSi(CH 3) 2C≡CH, HC≡CSi(CH 3) 2-Si(CH 3) 2C≡CH or HC≡CSi(Ph) 2C≡CH] have been prepared in good yields from the reaction of [(μ-CO)Os 3(CO) 932-HC≡C-E-C≡CH)] with a molar equivalent of [Co 2(CO) 8] and [Ru 3(CO) 12], respectively. All the new heterobimetallic compounds have been characterized by IR and 1H NMR spectroscopy and mass spectrometry. The X-ray crystal structures and computational analyses based on density functional theory of these three molecules have been studied. Structurally, the dicobalt species adopts a pseudo-tetrahedral Co 2C 2 core with the alkyne bond which lies essentially perpendicular to the Co-Co vector. For the mixed osmium-ruthenium analogue, the hexanuclear carbonyl cluster consist of two trinuclear metal cores with the μ 3-(η 2-{pipe}{pipe}) bonding mode for the acetylene group in the former case and the μ 32, η 2 bonding mode in the latter one.

Original languageEnglish
Pages (from-to)885-900
Number of pages16
JournalJournal of Cluster Science
Volume23
Issue number3
DOIs
Publication statusPublished - Sep 2012

Scopus Subject Areas

  • Biochemistry
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

User-Defined Keywords

  • Alkyne
  • Cobalt
  • Mixed-metal cluster
  • Osmium
  • Ruthenium

Fingerprint

Dive into the research topics of 'Synthesis, Characterization and Structural Properties of Some Heterobimetallic Carbonyl Clusters Derived from Diethynylsilane and Diethynyldisilane Ligands'. Together they form a unique fingerprint.

Cite this