4-(4-Amino-phenyl-sulfon-yl)anilinium toluene-4-sulfonate

Graham Smith; Urs D Wermuth

doi:10.1107/S1600536813033023

4-(4-Amino-phenyl-sulfon-yl)anilinium toluene-4-sulfonate

Acta Crystallogr Sect E Struct Rep Online. 2013 Dec 14;70(Pt 1):o37. doi: 10.1107/S1600536813033023. eCollection 2014 Jan 1.

Authors

Graham Smith¹, Urs D Wermuth¹

Affiliation

¹ Science and Engineering Faculty, Queensland University of Technology, GPO Box 2434, Brisbane, Queensland 4001, Australia.

Abstract

In the title p-toluene-sulfonate 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-toluene-sulfonate anion are 72.34 (17) and 46.43 (17)°. All amine and aminium H atoms are involved in inter-molecular 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.