[Zurück]

U. Schubert, J. Pfeiffer, F. Stöhr, D. Sturmayr, S. Thompson:
"Transformations of organosilanes by Pt(II) complexes with hemilabile P,N-chelating ligands";
Journal of Organometallic Chemistry, 646 (2002), S. 53 - 58.

The article reviews the author's own work to enhance the reactivity of Pt(II) complexes towards organosilanes by employing hemilabile chelating ligands R₂N-R'-PPh₂ (P_N). Variation of the groups R and R' influences the reactivity of the complexes. (P_N)PtMe₂ reacts with HSiR₃ to yield (P_N)Pt(SiR₃)Me and (P_N)Pt(SiR₃)₂ along with MeSiR₃ and methane. An excess of HSi(OMe)₃ is catalytically converted into Si(OMe)₄. P_N-substituted Pt(II) complexes also catalyze the formation of disiloxanes from HSiR₃ and C-Cl/Si-H exchange reactions. The latter reaction yields dechlorinated hydrocarbons and chlorosilanes. Reaction of (P_N)PtMe₂ with ClSiPhMe₂ results in the stoichiometric formation of Ph₂Me₄Si₂, the Pt(IV) complex (P_N)Pt(Cl)Me₃ and the Pt(II) complex (P_N)Pt(Cl)Me. The corresponding bisphosphine complex (dppe)PtMe₂ undergoes none of these reactions.