The n.m.r. spectra are reported of the cations of a range of 4,4-dialkylcyclohexa-2,5-dienones. They confirm the hydroxyarenium ion structures previously assigned to various 4-protonated phenol derivatives. Estimates are made of the excess of charge at the ring positions of the cations, but these do not correlate with the rates of dienone–phenol rearrangements of the cations.
K. L. Cook, M. J. Hughes and A. J. Waring, J. Chem. Soc., Perkin Trans. 2, 1972, 1506 DOI: 10.1039/P29720001506
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