Synthesis, characterization and spectral studies of copper(II) complexes of o-ethyl and o-t-butylesters of hydrazine carboxylic acid

New copper(II) complexes of the general composition CUL 2 X 2 (where L = o-ethyl and o-t-butylesters of hydrazine carboxylic acid, X = Cl - , Br - , NO 3 -, NCS - ) have been synthesized and characterized by elemental analysis, molar conductance, spectroscopic techniques (UV-Vis, IR) and magnetic studies. All the complexes are non-electrolytic in nature except [CUL 2 (H 2 O) 2 SO 4 ] which is bi-bielectrolyte as revealed by their molar conductance data in nitrobenzene.