5-ARYL- AND 5-ALKYL-1,2,3,4-THIATRIAZOLES: SYNTHETIC, SPECTROSCOPIC, AND DEGRADATIVE STUDIES

A number of 5-(p-substituted)phenyl-1,2,3,4-thiatriazoles have been synthesized by the diazotization of p-substituted thiobenzhydrazides or by the reaction of sodium thiobenzoyl-thioglycollates with sodium azide. The thermal decomposition of these thiatriazoles yields nitriles, nitrogen, and sulphur. 5-Alkyl-1,2,3,4-thiatriazoles are very unstable and readily decompose to nitriles. Infrared and ultraviolet absorption spectra of 5-(p-substituted)phenyl-1,2,3,4-thiatriazoles have been studied. Infrared spectra of several thiohydrazides have also been studied and there appears to be no thiol–thione tautomerism in these derivatives. The thiatriazole ring is found to be electron withdrawing.