Synthesis, characterization and biological activity of triaminoxime and its metal complexes

Abstract

Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes of multifunctional triaminoxime have been synthesized and characterized by elemental analyses, IR, UV–Vis spectra, magnetic moments, 1H- and 13C-NMR spectra for ligand and its Ni(II) complex, mass spectra, molar conductances, thermal analyses (DTA, DTG and TG) and ESR measurements. The IR spectral data show that the ligand is bi-basic or tri-basic tetradentate towards the metals. Molar conductances in DMF indicate that the complexes are non-electrolytes. The ESR spectra of solid copper(II) complexes [(HL)(Cu)2(Cl)2] · 2H2O (2) and [(L)(Cu)3(OH)3(H2O)6] · 7H2O (6) show axial symmetry of a d x² − y 2 ground state; however, [(HL)(Co)] (4) shows an axial type with d Z 2 ground state and manganese(II) complex [(L)(Mn)3(OH)3(H2O)6] · 4H2O (10) shows an isotropic type. The biological activity of the ligand and its metal complexes are discussed.