Study of Enol-Keto Tautomerism of N-(2-Hydroxy-1-Naphthylidene)anils |
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Authors: | Pál Nagy Rozália Herzfeld |
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Institution: | Department of Chemistry , Juhász Gyula Teachers' Training College , P.O. Box 396, H-6701, Szeged, Hungary |
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Abstract: | The enol-keto tautomerism of N-(2-hydroxy-1-naphthylidene)anilines was studied. In response to the action of salts (e.g. CaCl2), in ethanolic solution the equilibrium is shifted extensively in the direction of the keto form; this allows determination of the concentration of the keto form and of the equilibrium constant of the process. In accordance with the Hammett equation, the equilibrium constant varies as a function of the constants a of the substituents on the aniline ring. |
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Keywords: | Schiff bases tautomerism substitution effect UV-visible spectroscopy |
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