A new complex has been synthesized with o-methylbenzoyl-benzoic acid (HL) and 1,10-phenanthroline (phen) in the mixture of water and ethanol. It crystallizes in monoclinic, space group C2/c with a = 13.6328(18), b = 17.7876(18), c = 19.998(2) A, β = 104.720(4)°,C_(54)H_(48)N_4O_(11)Zn, Mr = 994.33, V= 4690.2(9) A~3, D_c = 1.408 g/cm~3, Z = 4, F(000) = 2072, μ(MoKa) = 0.59 mm~(-1), R = 0.0736 and wR = 0.2029. The crystal structure shows that the zinc ions are coordinated with two oxygen atoms from two HL molecules and four nitrogen atoms fro...