Acta Cryst. (2008). E64, o1608 [ doi:10.1107/S160053680802312X ]
Abstract: The molecule of the title compound, C11H11N3O5, exists as the E isomer as it is stabilized by an intramolecular hydrogen bond. Except for the methyl H atoms, all atoms lie in special positions on a mirror plane and form a large conjugated system; the methyl H atoms are disordered about the mirror plane. In the crystalline state, bifurcated intra- and intermolecular N-HO hydrogen bonds and four intermolecular C-HO hydrogen bonds link the molecules into large perfectly planar sheets. Along the c axis, the N-N bond center approaches the phenyl-ring centroids of its neighbouring molecules above and below to give - overlap (at a distance of ca 3.57 Å), thus fusing the molecules into a three-dimensional framework.
Online 26 July 2008
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