Transition metal complexes derived from 1,3-dioxalane groups and vic-dioxime ligands: Thermal, magnetic and spectral studies

Abstract

A novel substituted vic-dioxime ligand containing the amino group, N,N′-[4,4′-{ethane-1,2-di-yl-bis(oxy)bis(4,1-phenylene)} bis(N′-hydroxy)- 2-(hydroxyimino)acetamidamide] (L1) has been prepared from 1,2-bis(p-aminophenoxy) ethane, anti-chloroglyoxime. This vic-dioxime ligand with Cu(II), Ni(II), Co(II) and Cd(II) complexes of 6,7-O-cyclopentylidine- 1-amino-4-azaheptane (L2) have been reacted at 60-65 °C temperature. The ligand1:metal:ligand2 ratio of these complexes have been found to be 1:2:2. The Cu(II), Ni(II), Co(II) and Cd(II) complexes of these ligands are proposed to be octahedral. The vic-dioxime (L1) with some transition metal complexes of amine (L2) have been characterized by elemental analyses, molar conductivity, magnetic susceptibility, IR, 1H NMR, UV-Vis spectra and TGA techniques.