2,4-dinitrophenylhydrazine, redetermined at 120 K:: a three-dimensional framework built from N-H ••• O, N-H ••• (O)2, N-H ••• π(arene) and C-H ••• O hydrogen bonds

In the title compound, C6H6N4O4, the bond distances indicate significant bond fixation, consistent with charge-separated polar forms. The molecules are almost planar and there is an intramolecular N - H center dot center dot center dot O hydrogen bond. The molecules are linked into a complex three-dimensional framework structure by a combination of N - H center dot center dot center dot O, N - H center dot center dot center dot(O)(2), N-H center dot center dot center dot pi( arene) and C - H center dot center dot center dot O hydrogen bonds.