SPECTRAL AND MAGNETIC STUDIES OF Co(II) COMPLEXES WITH SOME NITROGEN-OXYGEN AND NITROGEN-SULPHUR DONOR LIGANDS

Co(II) complexes were synthesized with thiosemicarbazones (L^1, L^3 and L^5) and semicarbazones (L^2, L^4 and L^6) derived from pyrrole-2-carboxyaldehyde, 2-acetyl furan and 2-acetyl thiophene. These complexes were characterized by elemental analysis, molar conductance, magnetic moment, mass, IR, electronic and EPR spectral studies. The molar conductance measurements of all the complexes in DMSO are corresponds to non electrolyte except [Co(L^1)2](NO3)2 and [Co(L^6)2](NO3)2 which are 1:2 electrolyte. On the basis of spectral studies an octahedral geometry may be assigned for all the complexes except [Co(L^1)2](NO3)2 and [Co(L^6)2](NO3)2 which are of tetrahedral geometry.