4-Benzenesulfonamidobenzoic acid

Abstract

In the mol-ecule of the title sulfonamide compound, C13H 11NO4S, the dihedral angle between the planes of the benzene ring and the carboxyl substituent group is 6.7 (4)°. The two aromatic rings are inclined at 45.36 (15)° to one another. In the crystal, adjacent mol-ecules are linked via classical inter-molecular N - H⋯O and O - H⋯O, and non-classical C - H⋯O hydrogen bonds, which stabilize the crystal structure.