The purpose of this study is to detect the electrochemical reduction of a novel N-(benzo[d]thiazol-2-yl)-3-oxo-3-(2-(1-(pyridin-2-yl)ethylidene)hydrazinyl)propenamide ligand (o-H2BMP) at varying pH by using a gold electrode in the presence of tetra butyl ammonium bromide as a supporting electrolyte at room temperature. The outcomes results showed that the effective reduction mechanism of the o-H2BMP ligand consumes 8 electrons and 8 hydrogen ions at pH 5, which belong to the reduction of azomethine and two carbonyl groups at (0.0518 V – 0.678 V), respectively. Also, the electrochemical behavior of Cd(II) ions in a cell containing 0.1 M KCl in 50 % (DMSO-water) mixed solvent by using glassy carbon electrode was proceeded with two electrons transfer as Cd+2/Cd0 in reversible mechanism. This work presents a novel structural analysis of the complexes that can be formed in solution and which exhibit stochiometric ratios of (M:L, 1:1, 2:3, 1:2). Moreover, the degree of reversibility of Cd(II) ions redox behavior was evaluated in the absence/presence of the o-H2BMP ligand which indicated that the redox behavior of Cd(II) ions more reversible in the case of free Cd(II) according to the ∆Ep, α, and kh values. While, in the presence of the o-H2BMP ligand, the degree of reversibility was decreased and the number of electrons transferred in the rate-determining step increased which confirming the complexation reaction of Cd(II) with the ligand.