Abstract
The ionization equilibria at 25°C in aqueous potassium hydroxide solutions of several Rauwolfia alkaloids and 2,3-dimethylindole as model compound have been investigated by U.V. spectrophotometry. Plots of the logarithms of the ionization ratios against the H- acidity function gave straight lines whose slopes are very close to unity. The pK BH values thus obtained are reported.
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