Thermal, spectral and magnetic studies of chloro complexes of cobalt, nickel and copper with 4-(butylamino) benzoic acid

Abstract

The chloro compounds of 4-(butylamino) benzoic acid with cobalt, nickel and copper were prepared in an ethanolic solution from which solid compounds were isolated. The compounds were characterised with analyses, magnetic moments, vibrational and electronic spectra. The cobalt compound has a tetrahedral structure while the nickel and copper compounds have polymeric octahedral structures. The thermal behaviour of these compounds has been studied by thermogravimetry and differential thermal analysis. The cobalt compound, which is hydrated, loses water of crystallisation followed by loss of organic ligand and chlorine to give the metal oxide. The nickel and copper compounds lose organic ligand and chlorine to give the metal oxide.