
TY  - JOUR
A1  - Angyal, SJ 
A1  - Warburton, WK 
T1  - Sulphonamides. II. Structure and Tautomerism of Sulphapyridine, Sulphathiazole, and Sulphanilylbenzamidine
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1951
VL  - 4
IS  - 1
SP  - 93
EP  - 106
KW  - 
UR  - https://doi.org/10.1071/CH9510093 
N2  - By the study of ultraviolet absorption spectra and comparison with methyl derivatives of known structure it is shown that the two forms of arylsulphonylbenzamidines described by Barber (1943) are tautomers, the more stable one having structure I.   In dilute solution, sulphathiazole is found to be mainly X, and sulphapyridine a mixture of XIII and XIV in a ratio which depends on the solvent and can be influenced by changes on the p-amino group. Bands of the spectra are assigned to structural features of these molecules. 
ER  -

