The iridium(III) dimethyl derivatives [Ir(Me)(2)Cp*L] (Cp* = eta(5)-C5Me5; L = PMe3 1a, PPh3 1d) catalyze the dehydrogenative coupling of dimethylphenylsilane in the presence of one-electron oxidants to yield Me2PhSiSiPhMe2. Compounds 1a-d react with triphenylsilane in the presence of [FeCp2]PF6 to give methane and [Ir(Ph)(SiFPh2)Cp*L] (L = PMe3 (2a), PMe2Ph (2b), PMePh2 (2c), PPh3 (2d)). 2a was structurally characterized by single-crystal X-ray diffraction experiments. The 'three-legged piano stool' coordination polyhedron is slightly deformed.
Catalytic and stoichiometric reactions of tertiary silanes with [Ir(Me)2Cp*L] (Cp*=h5-C5Me5; L= PMe3, PMe2Ph, PMePh2, PPh3) in the presence of one-electron oxidants. A unique case of Si-H, Si-C, Ir-C and P-F bonds one-step activation: crystal structure of [Ir(Ph)(SiPh2F)Cp*(PMe3)]
DIVERSI, PIETRO;MARCHETTI, FABIO;
2000-01-01
Abstract
The iridium(III) dimethyl derivatives [Ir(Me)(2)Cp*L] (Cp* = eta(5)-C5Me5; L = PMe3 1a, PPh3 1d) catalyze the dehydrogenative coupling of dimethylphenylsilane in the presence of one-electron oxidants to yield Me2PhSiSiPhMe2. Compounds 1a-d react with triphenylsilane in the presence of [FeCp2]PF6 to give methane and [Ir(Ph)(SiFPh2)Cp*L] (L = PMe3 (2a), PMe2Ph (2b), PMePh2 (2c), PPh3 (2d)). 2a was structurally characterized by single-crystal X-ray diffraction experiments. The 'three-legged piano stool' coordination polyhedron is slightly deformed.File in questo prodotto:
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