Synthesis of Dinuclear Complexes Bearing Metalloporphyrin−Phosphine Hybrid Ligands and Their Catalytic Activity toward Hydrosilylation of Ketones

A new type of metalloporphyrin−phosphine hybrid ligand (1) has been designed and synthesized. Reactions of some transition metal complexes such as PdCl₂, PtCl₂, and [RhCl(CO)₂]₂ with a zinc porphyrin−phosphine ligand (1; M¹ = Zn) afford the corresponding dinuclear complexes (2) bearing the hybrid ligand. The zinc porphyrin−phosphine compound (1; M¹ = Zn, R = Ph) has been found to work as an effective ligand for Rh(I)- or Ir(I)-catalyzed hydrosilylation of ketones to give the corresponding alcohols after acid hydrolysis.