N'-( 2,4-Dinitrophenyl) benzohydrazide

In the title compound, C13H10N4O5, the aromatic ring planes are close to perpendicular [dihedral angle = 75.94 (5)degrees] and the C - N - N - C torsion angle is 88.7 (2)degrees. 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)degrees. This allows for the formation of an intramolecular N - H center dot center dot center dot O hydrogen bond, which closes an S(6) ring. In the crystal, N - H center dot center dot center dot O hydrogen bonds link the molecules into zigzag chains extending along [100].