Tautomeric pyridines. Part XV. Pyridone–hydroxypyridine equilibria in solvents of differing polarity

Authors:
  • JFJudit Frank
    Judit Frank
  • AKAlan R. Katritzky
    Alan R. Katritzky
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Abstract
Tautomeric equilibria of the hydroxypyridine–pyridone type are investigated for five compounds: the proportion of pyridone form, dominant for H2O solutions, falls roughly linearly with the solvent polarity as measured by Z. In cyclohexane solution, comparable amounts of both forms are present.