E. Tiekink, J. Wardell
Jan 18, 2014
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Journal
Acta Crystallographica Section E: Structure Reports Online
Abstract
In the title compound, C14H8N4O6, the benzoxazin-4-one fused-ring system (r.m.s. deviation = 0.018 Å) is coplanar with the attached benzene ring [dihedral angle = 0.81 (4)°], there being an intramolecular N—H⋯N hydrogen bond between them. Each nitro group is twisted out of the plane of the attached benzene ring [O—N—C—C torsion angles = 167.94 (11) and 170.38 (11)°]. In the crystal, amine–nitro N—H⋯O hydrogen bonds lead to centrosymmetric dimeric aggregates that are connected into a three-dimensional architecture by oxazinyl–nitro C—H⋯O and π–π interactions [inter-centroid distance between the oxazinyl and terminal benzene rings = 3.5069 (7) Å].