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

    9 Citations (Scopus)

    Abstract

    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
    Volume362
    Issue number8
    DOIs
    Publication statusPublished - Jun 1 2009

    Keywords

    • Hydrido complex
    • Hydrosilanes
    • Iridium
    • Oxidative addition

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Inorganic Chemistry
    • Materials Chemistry

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