Reactions of HOSiMe2Ar with Pt-PPh3 complexes leading to Si-C bond activation or formation of a siloxoplatinum complex

Neli Mintcheva, Yasushi Nishihara, Atsunori Mori, Kohtaro Osakada

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19 Citations (Scopus)


PtI2(PPh3)2 reacts with HOSiMe2(C6H4CF3-4) at 60°C in the presence of AgBF4 to give a mixture of trans-PtI(C6H4CF3-4)(PPh3) 2 (1) and [Pt2(μ-I)2(PPh3)4](BF 4)2 (2). Each of the complexes is isolated and characterized by X-ray crystallography and/or NMR spectroscopy. The 31P{1H}-NMR study of the reaction of AgBF4 with PtI2(PPh3)2 in acetone-d6 revealed the formation of trans-[PtI(PPh3)2(acetone)]BF4 (3) although isolation of the cationic complex was not feasible due to its facile conversion to 2. Addition of HOSiMe2(C6H4CF3-4) and Ag2O to a toluene solution of trans-PtI(Ph)(PPh3)2 causes replacement of the iodo ligand with the siloxo group to afford trans-[Pt(Ph){OSiMe2(C6H4CF 3-4)}(PPh3)2] (4). Crystallographic results of 4 show the coordination of the phenyl, siloxo, and PPh3 ligands to the square-planar Pt center with a large Pt-O-Si angle. Complex 4 does not decompose below 60°C in a toluene solution, but reacts with CH2Cl2 and CHCl3 at room temperature to form trans-PtCl(Ph)(PPh3)2 (5).

Original languageEnglish
Pages (from-to)61-67
Number of pages7
JournalJournal of Organometallic Chemistry
Issue number1-2
Publication statusPublished - Jun 1 2001
Externally publishedYes


  • Cationic complex
  • Platinum
  • Silanol
  • Siloxo complex
  • Transmetalation

ASJC Scopus subject areas

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


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