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Acta Cryst. (2014). E70, o37  [ doi:10.1107/S1600536813033023 ]

4-(4-Amino­phenyl­sulfon­yl)anilinium toluene-4-sulfonate

G. Smith and U. D. Wermuth

Abstract: In the title p-toluene­sulfonate salt of the drug dapsone, C12H13N2O2S+·C7H7O3S-, the dihedral angle between the two aromatic rings of the dapsone monocation is 70.19 (17)° and those between these rings and that of the p-toluene­sulfonate anion are 72.34 (17) and 46.43 (17)°. All amine and aminium H atoms are involved in inter­molecular N-H...O hydrogen-bonding associations with sulfonyl O-atom acceptors as well as one of the sulfone O atoms, giving a three-dimensional structure.


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