PAPER TITLE :SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITIES OF MERCAPTOBENZIMIDAZOLE,THIOSEMICARBAZIDE AND THIOCYANATE MIXED LIGANDS COBALT(II) COMPLEXES

FUTA JOURNAL OF RESEARCH IN SCIENCE | VOLUME 9 NUMBER 1 2013

Paper Details

  • Author(s) : A.E. Okoronkwo1, B.J. Owolabi1, O.J. Lumure1 and S.A. Olagboye2
  • Abstract:

Mixed ligand Cobalt(II) complexes with mercapto benzimidazole, thiosemicarbazide and thiocyanate have been
synthesized and analyzed. Characterization by elemental analysis, conductivity, melting point, solubility, Uv-visible
and IR-spectroscopic studies showed the formation of mono and di- nuclear complexes. Spectral studies results
suggest a tetrahedral geometry for the cobalt (II) thiosemicarbazide complex and octahedral arrangement for the
mercapto benzimidazole mixed ligand complexes. A dimerized structure was proposed for the
mercaptobenzimidazole cobalt(II) complex. In these complexes, the metal ion coordinates to the ligand through the
nitrogen atom. The thiocyanate ion attaches via the sulphur atom. The results of conductivity revealed that the
complexes were all non –electrolytes. The metal complexes were screened for their antimicrobial activities using
agar disc diffusion technique and the results revealed that they were active against both bacteria and fungi species
tested.
Keywords: Cobalt complexes, mixed ligand, mercapto benzimidazole, thiosemicarbazide, antimicrobial activities.