title: 4-(4-Nitro-benzene-sulfonamido)pyridinium trifluoro-acetate.
abstract: In the title compound, C(11)H(10)N(3)O(4)S(+)·C(2)F(3)O(2) (-), the benzene ring makes an angle of 87.3 (2)° with the pyridinium ring. The nitro group is essentially coplanar with the benzene ring. The F atoms of the CF(3) group are disordered over two positions with almost equal occupancy [0.531 (12)/0.469 (12)]. The crystal structure is stabilized by N-H⋯O and C-H⋯O hydrogen bonds.
authors.forename: Jiang-Sheng
authors.initials: JS
authors.lastname: Li
authors.forename: Mei-Lian
authors.initials: ML
authors.lastname: Fan
authors.forename: Wen-Sheng
authors.initials: WS
authors.lastname: Li
authors.forename: Wei-Dong
authors.initials: WD
authors.lastname: Liu