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Catalytic Liquid-Phase Oxidation of Cyclooctane.-The oxidation of cyclooctane (I) with oxygen in the presence of cobalt(III) or manganese(III) acetate catalysts affords the suberic acid (II). Side products are the C 7 -C 5 homologues (pimelic, adipic, and glutaric acid) as well as cyclooctanol and cyclooctanone. The reaction proceeds via a cyclooctylhydroperoxide which is oxidized via a cyclooctanone-catalyst complex to afford the diacid (II). When chromium(III) acetate is used as catalyst, the reaction exclusively affords cyclooctanone. Under oxygen-deficient conditions, the formation of the lower homologues, especially the adipic acid, is preferred. -(CHABUTKINA, E. M.; ARTEM'EVA, N. V.; KUNITSKII, A. A.; ZHUKOV, YU. P.; ANTONOVA, T. N.; Neftekhimiya 38 (1998) 2, 111-114; Yaroslavskii gos. tekh. univ., Yaroslavl' 150023, Russia; RU)