Benzimidazole based terpyridine ligand has been prepared and cobalt and nickel complexes containing benzimidazolyl terpyridine have been synthesized. Spectral techniques such as UV-Vis, FT-IR and ESI-MS were employed to characterize the compound. Electrochemical behavior of the metal complexes has been studied using cyclic voltammetry method. DPPH free radical scavenging activity showed the complex with nickel atom shows better activity than that of the one with cobalt atom. In addition, the MTT assay was carried out to investigate the anticancer activity of the compounds with MCF7 breast cancer cell lines. Compound containing nickel atom showed the best activity than the ligand and cobalt compound.