Spectroscopic and thermal studies of some Palladium complexes with certain Heterocyclic Nitrogen ligands

Abstract

Mono- and binuclear palladium complexes were isolated from reactions of [PdCl4]2− with heterocyclic nitrogen donor ligands depending on the type of ligand. Bidentate ligands L–L, where L–L = 2-(2′-pyridyl)-benzimidazole (PBI), 2-pyrazinecarboxylic acid (PC) and 2-pyrazinecarboxamide (PCA) gave the monosubstituted [Pd(L-L)Cl2] complex. Binuclear palladium complexes [Pd(L)Cl2]2 were obtained from reactions with the monodentate ligands 2-aminothiazole (AT) or 2-aminobenzimidazole (ABI). Elemental analyses and spectroscopic studies of the reported complexes allowed structures to be proposed. The thermal properties of the complexes were also investigated by thermogravimetric techniques.