Solutions of p-cyano, p-fluoro, p- and m-hydroxy-benzoic acids in ehtanol react with aqueous solutions of copper- (II) aceetate to yield complexes of empirical formula [Cu(X-C 6H 4CO 2)(OH)]. The use of similar reaction conditions for p-chloro-, p-bromo-and p-iodo-benzoic acids affords ethanol adducts of the corresponding copper benzoates, Cu(X-C 6H 4CO 2) 2.C 2H 5OH. The latter compounds display subnormal magnetic moments and antiferromagnetism similar to that noted for copper acetate monohydrate. The presence of analogous binuclear structural species is proposed. On the basis of the normal moments and infrared spectral evidence, it is suggested that the complexes containing hydroxy groups are composed of polymeric hydroxide-bridged structural units. The magnetic behavior of these derivatives has been related to previously experienced difficulties in correlating the magnetic susceptibilities of copper(II) salts of substituted benzoic acids with the substituents on the phenyl ring.