Acid-Base Equilibria of Some N-Substituted Thiophene-2-Carboxamidoximes in Non-Aqueous Media

Authors: NEDİME DÜRÜST, YAŞAR DÜRÜST, İLKNUR MERİÇ

Abstract: The protonation constants of the amino nitrogens of some N-substituted thiophene-2-carboxamidoximes have been determined in acetic acid by means of potentiometric titration with perchloric acid. pK_{a} values of the title compounds were interpreted on the basis of structural effects due to the substituents and the main skeleton.

Keywords: Thiophene, protonation constant, potentiometry, pK_{a} values, amidoxime.

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