Meng Xu-Feng, Wang Dong-Yue, Ma Jing-Jun
Hebei Key Laboratory of Bioinorganic Chemistry, College of Sciences, Agricultural University of Hebei, Baoding 071001, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2012 Jan;68(Pt 1):o20. doi: 10.1107/S1600536811051233. Epub 2011 Dec 3.
The mol-ecule of the title compound, C(14)H(11)N(3)O(4), assumes an E conformation about the C=N double bond. The benzene rings form a dihedral angle of 3.9 (2)°. The crystal structure is stabilized by N-H⋯O, O-H⋯N, O-H⋯O and C-H⋯O hydrogen bonds, forming layers parallel to (101). In addition, intra-layer π-π stacking inter-actions [centroid-centroid distance = 3.635 (2) Å] are observed.