Determination of the protonation constant of some new 3-alkyl(aryl)-4-(pcarboxyphenyl)- 4,5-dihydro-1H-1,2,4-triazole-5-one derivative compounds with spectrophotometric method

F. Ä°slamoÃ

Abstract

The protonation constant values of different four triazole derivatives have been determined in ethanol %50 – water %50 mixtures by spectrophotometric methods. The electronic absorption spectra of different four triazole derivatives at various pH values at 190-400 nm intervals were recorded. The calibration of the electrode system was done potentiometrically by Gran’s method. Data were calculated using the linearization method with Henderson-Hasselbach equation. The obtained results are in good accordance with potentiometric values.