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Oxidation with chromic acid in glacial acetic acid solution yielded a small quantity of acid, m. p. 230-235°. The physical constants checked fairly closely those of />-chlorocumene prepared by a boron fluoride alkylation method in this Laboratory,11 but the discrepancies seemed to indicate that a mixture of isomeric chlorocumenes were present, among which the para predominated.A higher-boiling chlorocumene fraction, b. r. 125-126 (100 mm.), was observed to have d20 0.9816 and m21id 1.5075. The acid derivative was prepared and purified by sublimation, m. p. 239-241 °, checking the literature for ¿ -chlorobenzoic acid.Diisopropylbenzene impurities probably caused the depression of specific gravity and refractive index values.

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