Abstract
On the basis of calculations of the basicities of possible protonation sites, electronic spectra, and potentiometric titration, it has been shown that 6- and 2-(arylazo)-3-hydroxypyridines exist in nitromethane and acetonitrile in the hydroxyazo-form, and are protonated at the pyridine nitrogen atom.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1656–1661, December, 1984.
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Dyumaev, K.M., Osmolovskaya, L.A. & Korolev, B.A. Tautomerism of 6- and 2-(arylazo)-3-hydroxypyridines in aprotic polar solvents. Chem Heterocycl Compd 20, 1364–1369 (1984). https://doi.org/10.1007/BF00505961
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DOI: https://doi.org/10.1007/BF00505961