Synthesis and Structural Characterization of New Bimetallic [C,N,S] Palladacycles with Mixed Bridging [P,P] and Chelating [P,P] or [P,N] Phosphane Ligands

Treatment of bimetallic palladacycles with silver perchlorate, followed by reaction with tertiary diphosphanes or diphenyl‐2‐pyridylphosphane gave novel dipalladium compounds with chelating [C,N,S], bridging [P,P], and chelating [P,P] or [P,N] ligands, as appropriate. The short‐chain diphenyl‐2‐pyridylphosphane ligand forms stable four‐membered P–N chelates, which display S–Pd–P and N–Pd–P trans geometries. The Pd–Cl bonds are nonreactive towards displacement by the [P,P] or [P,N] ligands, even in the case of strong chelating diphosphanes. New bimetallic palladacycles with bridging [P,P] and chelating [P,P], [P,N], and [C,N,S] donors are reported.