Hu Liang-Bin, Chen Jian, Liu Chang-Zhong
Acta Crystallogr Sect E Struct Rep Online. 2008 Nov 8;64(Pt 12):o2277. doi: 10.1107/S1600536808035526.
The title compound, C(11)H(9)N(3)O(4)S·H(2)O, contains both an acid and a base centre and displays a zwitterionic structure. There are two independent mol-ecules and two water mol-ecules in the asymmetric unit. The dihedral angles between the benzene ring and the pyridinium ring are 109.7 (1) and 110.7 (1)°. The dihedral angles between the nitro group and the benzene ring are 116.1 (2) and 116.7 (1)°. The crystal structure is stabilized by N-H⋯O, O-H⋯N and O-H⋯O hydrogen bonds.
标题化合物C(11)H(9)N(3)O(4)S·H(2)O同时含有一个酸性中心和一个碱性中心,呈现出两性离子结构。不对称单元中有两个独立分子和两个水分子。苯环与吡啶鎓环之间的二面角分别为109.7 (1)°和110.7 (1)°。硝基与苯环之间的二面角分别为116.1 (2)°和116.7 (1)°。晶体结构通过N-H⋯O、O-H⋯N和O-H⋯O氢键得以稳定。