title: 4-(4-Nitro-benzene-sulfonamido)pyridinium trichloro-acetate.
abstract: In the title compound, C(11)H(10)N(3)O(4)S(+)·C(2)Cl(3)O(2) (-), the benzene ring forms an angle of 85.21 (13)° with the pyridinium ring. The nitro group is nearly coplanar with its attached benzene ring [dihedral angle = 3.68 (12)°]. In the crystal structure, strong N-H⋯O hydrogen bonds link the ion-pairs. The packing is further consolidated by weak C-H⋯O inter-ations.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhou
authors.forename: Peng-Wu
authors.initials: PW
authors.lastname: Zheng
authors.forename: Ke-Yue
authors.initials: KY
authors.lastname: Liu
authors.forename: Dan
authors.initials: D
authors.lastname: Cheng