Raza Abdul Rauf, Danish Muhammad, Tahir M Nawaz, Nisar Bushra, Iqbal Mohammad S
Acta Crystallogr Sect E Struct Rep Online. 2009 Jun 20;65(Pt 7):o1630. doi: 10.1107/S1600536809022843.
The asymmetric unit of title compound, C(7)H(6)N(2)O(4), contains two mol-ecules, one of which has a disordered nitro group with an occupancy ratio of 0.517 (9):0.483 (9) for the O atoms. Both mol-ecules contain an intra-molecular O-H⋯O hydrogen bond. In the crystal, both mol-ecules form inversion dimers linked by pairs of N-H⋯O hydrogen bonds, resulting in R(2) (2)(8) ring motifs. The dimers are connected by further N-H⋯O links and weak C-H⋯O inter-actions, resulting in a layered motif.
标题化合物C(7)H(6)N(2)O(4)的不对称单元包含两个分子，其中一个分子的硝基无序，O原子的占有率为0.517 (9):0.483 (9)。两个分子均包含分子内O-H⋯O氢键。在晶体中，两个分子通过N-H⋯O氢键对形成反演二聚体，形成R(2) (2)(8)环 motif。二聚体通过进一步的N-H⋯O连接和弱C-H⋯O相互作用相连，形成层状 motif。
