Platinum(II) dimethyl and diphenyl complexes with some bidiazines and 3,6-bis(2′-pyridyl)pyridazine

Abstract

The dimethyl and diphenyl platinum(II) complexes with 3,3′-bipyridazine (bpdz), 2,2′-bipyrazine (bpz) and 3,6-bis(2′-pyridyl)pyridazine (dppn) are reported. The newly synthesized compounds were characterized by elemental analysis, 1H NMR and electronic spectroscopy. The strength of the back- bonding interaction of these nitrogen-containing ligands has been estimated on the basis of the energy of the first metal-to-ligand chaarge transfer electronic transition. In this respect the present results, together with the literature data conceming the homologous derivatives containing 2,2′-bipyridine (bipy) and 2,2′-bipyrimidine (bpym), give the following order bpdz ⋍ bpz > dppn > bpym > bipy.