Acta Cryst. (2014). E70, o598-o599
[ doi:10.1107/S160053681400871X ]
Abstract: The title Schiff base compound, C15H15N3O3, crystallizes with two molecules (A and B) in the asymmetric unit. Each molecule adopts an E conformation around the C= N imine bond. The two molecules have minor differences in their conformations. In molecule A, the dihedral angle between the nitro group and its benzene ring is 2.1 (2)° and that between the two benzene rings is 0.88 (7)°, while the corresponding angles for molecule B are 5.7 (1) and 2.45 (6)°, respectively. In each molecule, there is an intramolecular O-HN hydrogen bond. In the crystal, inversion-related molecules are linked via O-HO hydrogen bonds forming A-A and B-B dimers. These dimers are linked via C-HO hydrogen bonds involving the nitro O atoms, forming A-A-A and B-B-B slabs that lie parallel to one another and to (010).
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