THE THERMAL, SPECTRAL AND MAGNETIC STUDIES OF HIPPURIC-ACID COMPOUNDS OF COBALT(II), NICKEL(II), COPPER(II) AND ZINC(II) IONS

Compounds of hippuric acid with cobalt, nickel, copper and zinc have been prepared in aqueous solution. The compounds which have been characterised by analyses, magnetic moments, and vibrational and electronic spectra have their metal ions in an octahedral environment. The thermal behaviour of the compounds has been studied by thermogravimetry and differential thermal analysis. The compounds, which are hydrated, lose their water of crystallisation followed by the organic ligand to give the metal oxide.