The title complex of copper(II) with m-chlorobenzoic acid, 1,10-phenanthroline (phen) and copper perchlorate has been synthesized and characterized in the solvent mixture of water and methanol. Crystal data for this complex: triclinic, space group P, a = 1.06853(12), b = 1.30740(16), c = 1.49546(17) nm, α = 101.791(2), β = 103.413(2), γ = 105.815(2)o, V = 1.8736(4) nm~3, M_r = 904.67, D_c = 1.604 g/cm~3, Z = 2, F(000) = 924, μ = 1.34 mm~(-1), GOOF = 1.049, the final R = 0.0324 and wR = 0.0797. The structure analysis shows that a chair-like ...