SYNTHESIS AND SPECTRAL STUDIES OF Mn (II) COMPLEXES WITH 2-HEPTANONE SEMICARBAZONE AND THIOSEMICARBAZONE

Complexes of Manganese(II) of general composition Mn(L)(2)X-2 have been synthesized with ligand 2-heptanone semicarbazone and 2-heptanone thiosemicarbazone (where L = 2-heptanone semicarbazone or 2-hepatanone thiosemicarbazone and X=Cl-, SO42-, CH3COO-, NCS-, ClO4-) The IR spectral data of ligands indicate the involvement of sulphur/oxygen and nitrogen in coordination to the central metal. The molar conductance of the complexes of the complexes in fresh solution of DMSO lies in the range of 10 -20 Omega(-1) cm(2)mol(-1) indicating their non-electrolyte behaviour thus the complexes may be formulated as [M(L-2)X-2]. Ligands were characterized by Mass, NMR, and IR. All the complexes were characterized by elemental analysis, magnetic moments, IR, electronic and EPR spectral studies. All the manganese (II) complexes in present study show magnetic moment in the range of 5.90-6.05 B.M; corresponding to five unpaired electrons and hence these are high-spin complexes. The Schiff's base ligands forms hexacoordinated complexes having octahedral geometry for Mn(II).