Comparative reactivity of triorganosilanes, HSi(OEt)3 and HSiEt3, with IrCl(CO)(PPh3)2. Formation of IrCl(H)2(CO)(PPh3)2 or Ir(H)2(SiEt3)(CO)(PPh3)2 depending on the substituents at Si

Yasushi Nishihara, Miwa Takemura, Kohtaro Osakada

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Reaction of HSi(OEt)3 with IrCl(CO)(PPh3)2 (5:1 molar ratio) at room temperature for 1 h gives IrCl(H){Si(OEt)3}(CO)(PPh3)2 (1), which is observed by the 1H and 31P{1H} NMR spectra of the reaction mixture. The same reaction, but in 20:1 molar ratio at 50 °C for 24 h produces IrCl(H)2(CO)(PPh3)2 (2) rather than the expected product Ir(H)2{Si(OEt)3}(CO)(PPh3)2 (3) that was previously reported to be formed by this reaction. Accompanying formation of Si(OEt)4, (EtO)3SiOSi(OEt)3, and (EtO)2HSiOSi(OEt)3 is observed. On the other hand, trialkylhydrosilane HSiEt3 reacts with IrCl(CO)(PPh3)2 (10:1 molar ratio) at 80 °C for 84 h to give Ir(H)2(SiEt3)(CO)(PPh3)2 (4) in a high yield, accompanying with a release of ClSiEt3.

Original languageEnglish
Pages (from-to)2951-2956
Number of pages6
JournalInorganica Chimica Acta
Issue number8
Publication statusPublished - Jun 1 2009


  • Hydrido complex
  • Hydrosilanes
  • Iridium
  • Oxidative addition

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Comparative reactivity of triorganosilanes, HSi(OEt)<sub>3</sub> and HSiEt<sub>3</sub>, with IrCl(CO)(PPh<sub>3</sub>)<sub>2</sub>. Formation of IrCl(H)<sub>2</sub>(CO)(PPh<sub>3</sub>)<sub>2</sub> or Ir(H)<sub>2</sub>(SiEt<sub>3</sub>)(CO)(PPh<sub>3</sub>)<sub>2</sub> depending on the substituents at Si'. Together they form a unique fingerprint.

Cite this