SYNTHESIS AND SPECTROSCOPIC STUDIES OF COBALT (II) COMPLEXES WITH NITROGEN- OXYGEN AND NITROGEN SULPHUR DONOR LIGANDSAbstract
CoII complexes of ligands pyridine3carboxamide thiosemicarbazone (L1), pyridine 3 carboxamide semicarbazone (L2), pyridine2carboxamide thiosemicarbazone (L3) and pyridine 2 carboxamide semicarbazone (L4) have been synthesized. The ligands were characterized based on elemental analyses, IR, 1HNMR studies while the complexes were characterized by elemental analyses, molar conductance, magnetic moment, IR, electronic and EPR spectral studies. The complexes are not soluble in ordinary organic solvent but highly soluble in dimethylsulfoxide. The conductivity data show the nonelectrolytic nature of the complexes. Based on elemental analyses, molar conductance data and other spectral studies the complexes were found to have general composition [Co (L)2X2] (where L=L1, L2, L3 and L4, X = Cl–, ½SO42–,NO3–) and exhibit distorted octahedral geometries.
S. Chandra *, S. Raizada and S. Sadwal
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, Jawaharlal Nehru Marg, New Delhi, India.
06 April 2014
14 June 2014
10 July 2014
01 November 2014