Thermolysis of Ru(IMes)(dppp)(CO)H-2 (1, IMes = 1,3-dimesityl-1,3-dihydro-2H-imidazol-2-ylidene; dppp = Ph2PCH2CH2CH2PPh2) in the presence of trimethylvinylsilane yields Ru(I-Mes')(dppp)(CO)H (2) resulting from intramolecular ArCH2 -H C-H bond activation of the N-heterocyclic carbene ligand. The structures of 1 and 2 have been established by X-ray crystallography. Treatment of Ru(IMes)(arphos)(CO)H2 (3, arphos=Ph2AsCH2CH2PPh2) with CH2=CHSiMe3 at 85degreesC produces a mixture of three C-H activated products 4a-c. The C-H activated complexes 2 and 4a-c reform their dihydride precursors upon heating under hydrogen.
|Number of pages||4|
|Journal||Advanced Synthesis & Catalysis|
|Publication status||Published - 2003|