title: 4-[(2-Hy-droxy-5-nitro-benzyl-idene)amino]-benzene-sulfonamide.
abstract: The title Schiff base compound, C(13)H(11)N(3)O(5)S, exists in an E configuration with respect to the C=N double bond. The benzene rings are almost coplanar, making a dihedral angle of 2.82 (6). The sulfonamide group is twisted away from the attached phenyl ring with an N-S-C-C torsion angle of 64.84 (11)°. An intra-molecular O-H⋯N hydrogen bond stabilizes the mol-ecule, generating an S(6) ring motif. In the crystal, inter-molecular N-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules into a three-dimensional network.
authors.forename: Yi-Han
authors.initials: YH
authors.lastname: Tan
authors.forename: Siang Guan
authors.initials: SG
authors.lastname: Teoh
authors.forename: Wan-Sin
authors.initials: WS
authors.lastname: Loh
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun