Synthesis, characterization and properties of some ternary copper(II) complexes containing NOS donor Schiff base and NN donor bidentate ligands

Abstract

Six ternary copper(II) complexes, viz., [Cu(SAT)(H₂O)] (1), [Cu(SAT)(phen)].0.5 H2O (2), [Cu(SAT)(bipy)] (3), [Cu(SAA)(dmp)] (4), [Cu(SAT)(en)] (5) and [Cu(SAT)(temed)] (6), where SAT = Salicylideneaminothiophenol, phen = 1,10-phenanthroline, bipy = 2,2-bipyridyl, dmp = 2,9-dimethyl 1,10-phenanthroline, en = ethylenediamine, temed = N,N,N',N'-tetramethylethylinediamine have been synthesized and characterized by various physico-chemical techniques. The metal ligand bonding parameters evaluated from the EPR spectra of the complexes indicate strong in-plane σ and in-plane π bonding. The magnetic and spectroscopic data indicate a square planar geometry for complex 1 and a square pyramidal geometry for remaining complexes. The crystal structure of complex 2 has been determined by X-ray diffraction technique. The superoxide dismutase activity of the complexes has also been measured and discussed.