Determination of the pKa of Some Triazole Derivatives by the Potentiometric Method in Dioxan-Water Mixtures

Fatih Islamoglu and Bahittin Kahveci

Department of Chemistry, Faculty of Sciences and Arts, Rize University, Rize-53100 Turkey.

ABSTRACT:

Stoichiometric protonation constants of some 3-alkyl(aryl)-4-(substituted benzylamino)-4,5-dihydro-1H-1,2,4-triazol-5-ones derivatives were determined potentiometrically in 50% (v/v) dioxan-water mixtures at 25oC with an ionic strength of 0.10 M. The calculation of the stoichiometric protonation constants was carried out using a PKAS computer program. The effect of solvents composition on the stoichiometric protonation constants are discussed.

KEYWORDS:

Potentiometric titration; protonation constants; solvent effect; triazoles

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Copy the following to cite this article: Islamoglu F, Kahveci B. Determination of the pKa of Some Triazole Derivatives by the Potentiometric Method in Dioxan-Water Mixtures. Orient J Chem 2011;27(4).

Copy the following to cite this URL: Islamoglu F, Kahveci B. Determination of the pKa of Some Triazole Derivatives by the Potentiometric Method in Dioxan-Water Mixtures. Orient J Chem 2011;27(4). Available from: http://www.orientjchem.org/?p=24166