Synthesis, Characterization and Spectral Studies of Hydrazide Schiffs Base with Metalions Such as Co (II), Ni (II) and Cu (II)

A series of Cu(II), Ni(II) and Co(II), complexes have been synthesized from the schiff base ligands L-1 and L-2. The schiff base ligand L-1 N-(2-hydroxybenzylidene) (L) has been synthesized by the reaction between salicyladehyde and benzoyl hydrazine, and the Schiff base ligand L-2 N, N'-Ethylene bis(salicylidenimine) has been synthesized by the reaction between salicyladehyde and ethylene diamine. The nature of bonding and geometry of the transition metal complexes as well as schiff base ligand L-1 and ligand L-2 have been deduced from elemental analysis, FT-IR, UV-Vis,, magnetic susceptibility, and molar conductance measurements. Cu(II), Ni(II) and Co(II) metal ions are forming 1: 2 (M:L) complexes, Based on elemental, conductance and spectral studies, six-coordinated and four -coordination geometries was assigned for Cu(II), Ni(II) and Co(II) complexes. The complexes are 1: 2 electrolytes in DMSO which is neutral in DMSO. The ligand L1 acts as tridentate and coordinates through nitrogen atom of azomethine group, oxygen atom of carbonyly group Benzohydrazide and oxygen atom of hydrazoic group of benzoyl hydrazine and the L-2 acts as bidentate and coordinate through nitrogen atom of azomethine and oxgen atom of hydraoxy group of salicyladehyde.