Synthesis and characterization of Co(III) complexes of 2-pyridinecarboxaldehyde thiosemicarbazone

Cobalt(III) complexes of 2-pyridinecarboxaldehyde thiosemicarbazone with an appropriate anion such as Cl-, NCS-, NO3- and CN- were prepared. Elemental analysis, magnetic measurements and EPR data, molar conductances and infrared spectra of these complexes were employed to characterize the complexes. 2-pyridinecarboxaldehyde thiosemicarbazone is coordinated to Co(III) ion in a 2:1 ratio. The anions associate with the high spin cobalt(III) in the polycrystalline complexes. We confirmed by titrimetric analysis using standard thiosulphate that cobalt is in a tripositive state in all the complexes. © 1985.