Cobalt(III) complexes of the type cis-β-[Co(trien)(4-R-Py)Cl]Cl2 : Synthesis,spectral characterization and redox behaviour

摘要

Six new cobalt(III) complexes of the type cis-β-[Co(trien)(4-R-Py)CI]C2, where R = H, Me, Et, t-Bu, COMe and CN have been prepared and characterized by elemental analysis, UV-Vis, FT-IR and ~1H NMR spectral techniques. The results of the spectral studies revealed that these complexes posses a cis-β arrangement of ligands around the metal ion. Molar conductance measurements supported the 1 : 2 nature of these complexes. Magnetic susceptibility measurements indicated that the complexes were diamagnetic. Thermal studies revealed that these complexes are thermally stable up-to 115 °C. The redox potential values obtained from differential pulse voltammetric technique of these complexes indicated that the redox behaviour depends on the nature of the sixth ligand.