Jones Oxidation: Alcohol to Carbonyl

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The Cr₂O₇^2- ion (Cr VI) forms HCrO_4^– in acidic aqueous solution, which can eliminate a molecule of water to give the reagent CrO₃. This then oxidises alcohols to a aldehdyes and ketones via the chromate ester intermediate. The reduced chromium (Cr IV) can undego series of reactions bringing it ultimately to the Cr (III) oxidation state.

K. Bowden, I. M. Heilbron, E. R. H. Jones and B. C. L. Weedon, J. Chem. Soc., 1946, 0, 39.

E. J. Corey and G. Schmidt, Tetrahedron Lett., 1979, 20, 399–402.