A study of the products obtained in the oxidation of p-tert-butyltoluene and Z, Z-bis (p-tolyl) propane at 182'and 200 psig 0 2 in a mixed solvent consisting of chlorobenzene and acetic acid, and in the presence of cobaltous acetate-hydrochloric acid catalyst, has revealed some significant differences in oxidation products as compared with similar experiments using the cobalt-bromide and cobalt acetate-2-butanone catalyst systems at 182 and 138", ...