Single Si–CR (R = Ph, Me, Et) bond activation in {o-(Ph2P)C6H4}2Si(Me)(R) induced by Rh(H)(CO)(PPh3)3 was developed. The efficiency of Si–CR bond breaking reactions increased at 60 °C in the order Si–CEt < Si–CMe < Si–CPh and strongly depended on the reaction temperature. Elevating the reaction temperature promoted Si–CMe over Si–CPh bond activation, demonstrating that Si–CMe cleavage is entropically favored but enthalpically unfavored in comparison with Si–CPh bond cleavage.
Dalton Transactions
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