Preparation, structural characterisation and thermal analyses studies of the cobalt(II), nickel(II) and copper(II) complexes of benzylmalonic acid

Abstract

Compounds of benzylmalonic acid with cobalt, nickel and copper have been prepared in aqueous solution. The compounds have stoichiometry Co(C 10H 8O 4)·2H 2O; Ni(C 10H 8O 4)·3H 2O and Cu(C 10H 8O 4). The cobalt and nickel complexes have octahedral structures, and the copper complex has a tetragonal structure. Thermal decomposition studies show that the cobalt and nickel complexes decompose with the loss of water followed by the organic ligand to give the metal oxides. The copper compound loses organic ligand to give copper oxide.