Coordination behavior of N-benzoylamino acids: Synthesis and structure of mixed-ligand complexes of palladium (II) with N-benzoylamino acid dianion and diamine

Four new mixed-ligand complexes of palladium (II) with L₁ (N-benwyl-α-amino acid dianion) and L₂ ethyldiamine (en), 2. 2′-bipyridine (Bpy) and 1.10-phenanthroline (Phen)] were synthesized. All the complexes have been characterized by elemental analyses, molar conductance, infrared and¹H NMR spectra and thermo-gravimetric analyses. Crystal structures of Pd(Bpy)(Bzval-N, O)] and Pd(en)(Bzphe-N, O) ·H₂O have been determined by X-ray diffraction analysis. The results indicate that in all the complexes’ ligand L₁ coordinates to palladium (II) through deprotonated amide nitrogen and carboxylic oxygen, and there are some intramolecular noncovalent interactions in the complexes. Project supported by the Natural Science Foundation of Zhejiang Province, China.