Synthesis, Acidity Constants and Tautomeric Structure of 7-Arylhydrazono[1,2,4]Triazolo[3,4-b][1,3,4]thiadiazines in Ground and Excited States
作者:Ahmad S. Shawali、Ibrahim F. Zeid、Mahmoud H. Abdelkader、Alsayed A. Elsherbini、Farag M. A. Altalbawy
DOI:10.1002/jccs.200100012
日期:2001.2
7-Arylhydrazono[1,2,4]triazolo[3,4-b][1,3,4]thiadiazines 4 were synthesized from the reactions of 4-amino-5-phenyl-4H-[1,2,4]triazole-3-thiol 2 and 2-(2-naphthyl)-2-oxoethanehydrazonoyl bromides 1 and their acid dissociation constants pK and pK*, in the ground and excited states, respectively, were determined. Both pK and pK* constants were correlated by Hammett equation. The pK and the spectral data