Proton transfer from and to the sulphur atom of toluene-α-thiol in anhydrous dimethyl sulphoxide has been followed by n.m.r. spectrosocopy under conditions of both acid (trifluoromethanesulphonic) and base (imidazole) catalysed exchange. The different mechanisms are discussed.
J. J. Delpuech and D. Nicole, J. Chem. Soc., Perkin Trans. 2, 1974, 1025 DOI: 10.1039/P29740001025
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