Abstract
AbstractCoH(N2)(PPh3)3 promotes carbon–oxygen (CO) bond cleavage in allylic carboxylates to give the corresponding olefins at room temperature. On the other hand, RuH2(PPh3)4 and RhH(PPh3)4 are mainly active for CO bond cleavage at elevated temperature. Reaction proceeds through a mechanism involving predissociation of one of the tertiary phosphines from the RuH2(PPh3)4 and RhH(PPh3)4 and competitive coordination of allylic carboxylates and PPh3 to the vacant site on ruthenium and rhodium. A new six‐membered metallocyclic complex, Co(OCOCH2COCH3)(PPh3)2, has been isolated.
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