Date Published: August 01, 2012
Publisher: International Union of Crystallography
Author(s): Aamer Saeed, Ifzan Arshad, Ulrich Flörke.
In the title compound, C13H10N4O5, the aromatic ring planes are close to perpendicular [dihedral angle = 75.94 (5)°] and the C—N—N—C torsion angle is 88.7 (2)°. Both nitro groups lie close to their attached ring plane, with C—C—N—O torsion angles of 3.1 (2) and 5.3 (2)°. This allows for the formation of an intramolecular N—H⋯O hydrogen bond, which closes an S(6) ring. In the crystal, N—H⋯O hydrogen bonds link the molecules into zigzag chains extending along .
For a related structure, see: Wardell et al. (2007 ▶).