Synthesis and spectroscopic studies of platinum(II) complexes of N,N′-dicyclohexylethylenediamine

Abstract

The platinum(II) complexes of the formula [Pt(DCHEDA)X 2], where DCHEDA is N,N′-dicyclohexylethylenediamine and X − is CL −, Br −, I −, 0.5C 2O 4 2− (oxalate), 0.5C 3H 2O 4 2− (malonate), 0.5C 9H 4O 6 2− (4-carboxyphthalate), 0.5S 2O 3 2− or 0.5SO 4 2−, have been synthesized and characterized by UVVis, IR, and 1H NMR spectral techniques. All the above complexes are non-electrolytes in DMF/H 2O, except the sulphate complex which becomes a 1:1 electrolyte after incubation for 24 h at 28 °C. The halide complexes were also studied by X-ray photoelectron spectroscopy and these data suggest that there is π-bonding from platinum to halide in these complexes. The oxalate, malonate and sulphate bind in their complexes as bidentate ligands to platinum through two oxygen atoms whereas the thiosulphate in its complex binds as a bidentate ligand to platinum through one oxygen atom and one sulphur atom.