6-Amino-4-(3-nitrophenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile ethanol solvate.

The title compound, C13H7N5O3·C2H6O, was synthesized by the reaction of 2-cyanoacetamide, malononitrile and 3-nitrobenzaldehyde in water. The asymmetric unit contains two crystallographically independent 6-amino-4-(3-nitrophenyl)-2-oxo-1,2-dihydropyridine-3,5-dicarbonitrile molecules of similar conformation and two ethanol solvent molecules. The nitro group of one molecule is disordered over two positions with site-occupation factors of 0.688 (17) and 0.312 (17). The dihedral angles between the pyridine and benzene rings are 52.06 (11) and 65.12 (13)° in the two molecules. The crystal packing is stabilized by N—H...O, N—H...N, O—H...O and C—H...O intra- and intermolecular hydrogen bonds. [ABSTRACT FROM AUTHOR]