Synthesis, Spectroscopic, and Electrochemical Studies on Some New Copper(II)‎ Complexes Containing 2-{[(Z)‎-Phenyl (Pyridine-2-yl)‎ Methylidene] Amino}Benzenethiol and Monodentate Ligands

Abstract EN

Five new mononuclear copper(II) complexes, namely, [Cu(L)(ImH)]·ClO41; [Cu(L)(Me-ImH)]·ClO42; [Cu(L)(Et-ImH)]·ClO43; [Cu(L)(2-benz-ImH)]·ClO44; [Cu(L)(benz-ImH)]·ClO45, where HL = 2-{[(Z)-phenyl (pyridine-2-yl) methylidene] amino} benzenethiol; ImH = Imidazole; Me-ImH = Methy-limidazole; Et-ImH = Ethyl-imidazole; 2-benz-ImH = 2-methyl-benzimidazole; benz-ImH = benz-imidazole, have been synthesized and characterized by various physicochemical and spectroscopic techniques.

Magnetic moments, electronic spectra, and EPR spectra of the complexes suggested a square planar geometry around Cu(II) ion.

The synthesized HL ligand behaves as monobasic tridentate Schiff base bound with the metal ion in a tridentate manner, with N2S donor sites of the pyridine-N, azomethine-N, and benzenethiol-S atoms.

The redox behaviour of the copper complexes has been studied by cyclic voltammetry.

Superoxide dismutase activity of these complexes has been revealed to catalyse the dismutation of superoxide (O2-) and IC50 values were evaluated and discussed.