Preparation and Characterization of some transition metal complexes of bis Schiff Base Ligand

In the study, transition metal complexes of Mn(II),Co(II) and Ni(II) were synthesized from the aromatic Schiff base ligand derived from 4-aminoantipyrine , p-dimethyl amino benzaldehyde , p-amino benzaldehyde to give the following ligand 4-(4-(4-dimethyl aminobenzylideneamino)benzylideneamino)-1,5-dimethyl-2-phenyl-pyrazol-3-one. The ligand and its metal complexes (II) are characterized on the basis of elemental analyses, magnetic moment measurements, molar conductance , melting point, infrared and UV-visible spectroscopy. On the basis of the studies the coordination sites were proven to be through oxygen of the ring C=O and nitrogen of the azomethine CH=N group. From the observations, the octahedral geometric structure for the synthesized complexes were suggested.