ISSN:
0749-1581
Keywords:
13C NMR
;
Aminosulfonic acids
;
Sulfanilic acid
;
Taurine
;
Tautomerism
;
Zwitterions
;
Dimethyl sulfoxide
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The 13C NMR spectra of three aminosulfonic acids (HA) [p-aminobenzenesulfonic acid (sulfanilic acid), amino-methanesulfonic acid and 2-aminoethanesulfonic acid (taurine)] and their anions (A-) and cations (H2A+) were obtained using aqueous H2SO4, fuming H2SO4 and Me2SO solutions of trifluoromethanesulfonic acid. The chemical shifts of HA, A- and H2A+ and the protonation and deprotonation shifts of HA are compared with corresponding data for related amines and sulfonic acids in Me2SO and water. Our results indicate that the three aminosulfonic acids are essentially zwitterionic in Me2SO.
Additional Material:
4 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/mrc.1260270307
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