Silver(I) complexes of bis[2-(diphenylphosphino)phenyl] ether

Abstract

The reaction of AgOTf in dichloromethane with bis(2-(diphenylphosphino)phenyl) ether (DPEphos) in an equimolar ratio afforded a dinuclear complex [Ag 2(κ 2- P, P′-DPEphos) 2(μ-OTf) 2] ( 1), whereas the similar reaction in a 1:2 molar ratio resulted in the formation of a bis-chelating complex [Ag(κ 2- P, P′-DPEphos) 2][OTf] ( 2). The silver(I) complex 1 was obtained as a dimer, in which two silver atoms are bridged by two triflate groups to form three adjacent eight-membered spirocyclic rings. The mixed-ligand complex [Ag(κ 2- P, P′-DPEphos)(2,2′-bpy)][OTf] ( 3) was obtained in the reaction of 1 in dichloromethane with 2,2′-bipyridine. The crystal structures of complexes 1– 3 were determined by single crystal X-ray analyses.