Syntheses and Crystal Structures of Three Palladium（Ⅱ） Complexes with Isonitrosobenzoylacetoneimine Ligand

Syntheses and Crystal Structures of Three Palladium (II) Complexes with Isonitrosobenzoylacetoneimine Ligand

Three palladium (II) complexes with the isonitrosobenzoylacetoneimine (HIBI) ligand, Pd (p‐CH₃C₆H₄IBI)₂ (1), Pd (C₆H₅IBI)₂ (2) and Pd₂Cl₂ (C₆H₅CH₂IBI)₂ · CHCl₃ (3), were prepared and characterized by IR, Raman and X‐ray diffraction studies. The geometries around the palladium atoms in the complexes 1 and 2 are distorted trans‐PdN₄ square planes, and the Schiff base ligands RIBI^? are coordinated through their oximo‐nitrogen atoms and imino‐nitrogen atoms. The week Pd…H? C agostic interactions [Pd…H = 0.2764 nm] complete the hexacoordinate environment around palladium in the complex 1. The octahedral deformation of the classical square planar environment of the Pd atom is due to the week Pd…O (1b) interactions [Pd? O (1b) = 0.3157 (9) nm] in the complex 2. The complex 3 is a first example of binuclear complex with isonitrosoketoimine ligands, in which one of oximo groups is coordinated through oximo‐nitrogen and oximo‐oxygen atoms.