Ion pairing effects in the formation of ruthenium formyls vis intermolecular hydride transfer

Abstract

For M = K, M[HRu3(CO)9(dppe)] reacts with trans-[Ru(CO)2(P–P)2][SbF6]2[P–P = 1,2-dis(diphenylpgosphino)ethane(dppe)or 1,2-dis(diphenylphosphino)benzene(dp)] to give trins-[Ru(CHO)(CO)(P–P)2]+ whereas for M = Na, no reaction is observed; the extent of ion-pairing is shown to be responsible for this difference is reactivity.