One novel complex [Co(p-MBA)2(2,2′-bipy)(H 2O)](H20) has been synthesized by the reaction of p-methylbenzoic acid with 2,2′-bipyridine in the solvent mixture of water and methanol. It crystallizes in triclinic, space group P1̄ with a = 0.70479(14), b = 1.1211(2), c = 1.6718(3) nm, α = 103.806(3), β= 90.795(3), γ = 104.207(3)°, V= 1.2399(4) nm3, Mr = 512.41, Dc= 1.373 g/cm3, Z = 2, F(000) = 532, μ = 0.733 mm-1, R= 0.0432 and wR = 0.0957. The crystal structural analysis shows that the cobalt atom is coordinated with three oxygen atoms fro...