6-Nitro-2,3-dihydro-1H-pyrrolo[2,1-c][1,4]benzodiazepine-5,11(10H,11aH)-dione

Abstract

In the two molecules of the asymmetric unit of the title compound, C12H11N3O4, the seven-membered diazepine ring adopts a boat conformation (with the two phenylene C atoms representing the stern and the methine C atom the prow). The five-membered pyrrole ring, which has an envelope conformation, makes dihedral angles of 60.47 (10) and 54.69 (9)° with the benzene ring of the benzodiazepine unit in the two molecules. In the crystal, intermolecular N—H...O hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.8023 (7)–3.8946 (7) Å] lead to the formation of a three-dimensional framework.