SPECTROSCOPIC APPROACH IN CHARACTERIZATION OF MONONUCLEAR MANGANESE (II), NICKEL (II) AND COPPER (II) COMPLEXES WITH A NITROGEN DONOR TETRADENTATE MACROCYCLIC SCHIFF’S BASE LIGAND

A. Rajput*, S. Gautam, S. Chandra and S. P. Sati

ABSTRACT

A tetradentate nitrogen donor [N4] macrocyclic Schiff’s base ligand, (L), has been synthesized. Mn(II), Ni(II) and Cu(II) complexes of this ligand have been synthesized and characterized by elemental analyses, molar conductance measurements, magnetic susceptibility measurements, mass, 1H-NMR (Ligand), IR, U and EPR UV-Vis. spectral studies. On the basis of molar conductance the Mn(II), Ni(II) and Cu(II) complexes may be formulated as [M(L)X2] where X = Cl-, CH3COO-, NO3-, SO42- due to their non-electrolytic nature in dimethylformamide (DMSO). All the complexes are of the high spin type and characterization study revealed six coordinated octahedral geometry but tetragonal in case of Cu (II) complexes due to distortion.

Keywords: Macrocyclic Ligand, Metal Complexes, Spectral Characterization, Six Coordinated Geometry.