Synthesis and characterization of Palladium(II) complexes of chiral chelating NHC–N donor hybrid ligands

A new class of palladium(II) complexes of chelating NHC–N donor hybrid ligands, such as NHC–sulfonamide (6), NHC–phenoxyimine (11), NHC–phenylimine (14), and NHC–amine (15) have been successfully synthesized in modest yields from 1,1′-binaphthyl-2,2′-diamine (BINAM). These complexes have been characterized by all the spectroscopic data, and the structures of 6, 11, and 14 were also confirmed by single-crystal X-ray diffraction studies, exhibiting a tridentate chelating motif around the palladium center.