Zou Pei, Xie Min-Hao, Luo Shi-Neng, Liu Ya-Ling, Shen Yong-Jia
Acta Crystallogr Sect E Struct Rep Online. 2009 Jan 17;65(Pt 2):o335. doi: 10.1107/S1600536809001093.
The structure of the title compound, C(9)H(7)NO(6), is essentially planar [maximum deviation 0.284 (2)Å] except for the methyl H atoms. The crystal structure is stabilized by asymmetric O-H⋯O hydrogen bonds linking the hydrogen carboxyl-ates into pairs around the inversion centres. There is also π-π stacking of the benzene rings [centroid-centroid distance 3.6912 (12) Å].
标题化合物C(9)H(7)NO(6)的结构除甲基氢原子外基本呈平面状[最大偏差0.284 (2)Å]。晶体结构通过不对称的O-H⋯O氢键得以稳定,这些氢键将氢羧酸盐围绕反演中心连接成成对结构。苯环之间还存在π-π堆积作用[质心-质心距离3.6912 (12) Å]。