Cobalt(II), nickel(II), and copper(II) complexes of malonoanilic acid hydrazones

924-926New complexes of malonoanilic acid hyd azones with Co(II), Ni(II) and Cu(II) have been synthesized and characterised on the basis of analytical, conductivity, magnetic moment, TG, DTA, infrared, electronic and EPR spectral data. Metal to ligand ratio in all the complexes has been found to be 1:1. Infrared spectral data show that the ligands behave in a dibasic tetradentate manner in all the complexes except in the case of Cu(II) complexes where they act as dibasic tridentate ligands with O:N:O donor sequence. Co(II) and Ni(II) complexes have octahedral geometry while Cu(II) complexes have square-planar structures