Cyclic voltammetry (CV) experiments were conducted on selected complexes to assess the impact of the electronic and steric effects on the redox potentials (Figure ). Since the complexes were poorly soluble in acetonitrile, the CV experiments were performed in DCM (0.30 mM solutions) using 0.30 M of tetrabutylammonium hexafluorophosphate as the supporting electrolyte at a scan rate of 100 mV s -1 . All the complexes exhibited irreversible oxidation waves and little reductive electrochemistry within the redox window of the DCM electrolyte solution (Figure ).