σ-Acetylide complexes of ruthenium and osmium containing alkynylsilane ligands

Wai Yeung WONG*, Chun Kin Wong, Guo Liang Lu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

The use of the ligands, diethynyldiphenylsilane and 1,3-diethynyltetramethyldisiloxane, in the synthesis of Group 8 metal σ-acetylide mononuclear complexes is demonstrated. New complexes trans-[(dppm)2ClMC≡CSi(Ph)2C≡CH] (M=Ru 1; Os 2) and trans-[(dppm)2ClMC≡CSi(Me)2-O-Si(Me)2C≡CH] (M=Ru, 3; Os, 4) featuring different silyl units were prepared from a mixture of cis-[M(dppm)2Cl2] and HC≡CSi(Ph)2C≡CH or HC≡CSi(Me)2-O-Si(Me)2C≡CH in the presence of NaPF6 followed by deprotonation with 1,8-diazabicyclo[5.4.0]undec-7-ene. All the new complexes have been fully characterized by FTIR and NMR spectroscopies and fast atom bombardment mass spectrometry. Single-crystal X-ray structures of 1 and 2 confirm that the two diphosphines adopt a trans geometry at the metal centre and one of the terminal ethynyl groups remains intact. Complexes 1-4 show reversible redox chemistry and their half-wave potentials due to the metal centres are less anodic than those for the starting precursors cis-[M(dppm)2Cl2] (M=Ru, Os).

Original languageEnglish
Pages (from-to)27-34
Number of pages8
JournalJournal of Organometallic Chemistry
Volume671
Issue number1-2
DOIs
Publication statusPublished - 1 Apr 2003

Scopus Subject Areas

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

User-Defined Keywords

  • Alkynyl complexes
  • Osmium
  • Ruthenium
  • Silane
  • Siloxane

Fingerprint

Dive into the research topics of 'σ-Acetylide complexes of ruthenium and osmium containing alkynylsilane ligands'. Together they form a unique fingerprint.

Cite this