Synthesis and spectroscopic studies of tetradentateschiff base complexes of Cu(II), Ni(II), Mn(II) and Co(II

Cu(II), Ni(II), Mn(II) and Co(II) complexes were synthesized with bis(salicylaldehyde)malonyldihydrazone a tetradentate ligand (L) and characterized by elemental analysis, molar conductance measurements, magnetic susceptibility, IR, electronic and EPR spectral studies. Metal(II) salts react with Schiff base ligand in 1:1 molar ratio. The ligand and its complexes are stable at room temperature and all of them are nonhygroscopic also. The elemental analysis for carbon, hydrogen and nitrogen were performed by micro analytical methods. Apart from this, the geometry of the newly synthesized compounds has been explained based on their elemental analysis, molar conductivity and spectral data. The molar conductance measurements of all the complexes in DMF solution correspond to electrolytic nature for the complexes except Mn(II) complexes.

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