2-Hydr-oxy-5-nitro-benzaldehyde 2,4-dinitro-phenyl-hydrazone

Abstract

In the title compound, C13H9N5O7, one of the nitro groups is twisted away from the attached benzene ring by 16.21 (8)°. The dihedral angle between the two benzene rings is 4.63 (1)°. The mol-ecular structure is stabilized by intra-molecular N - H⋯O and O - H⋯N hydrogen bonds which generate an S(6) ring motif. The mol-ecules pack as layers parallel to the ab plane; mol-ecules of adjacent layers are linked into chains along the [101] direction through N - H⋯O hydrogen bonds.