Acta Cryst. (2013). E69, o1687-o1688 [ doi:10.1107/S1600536813028493 ]
Abstract: In the title compound, C12H16N4O2, the piperazine ring is in a slightly distorted chair conformation. In the molecule, the mean plane of the nitro group is twisted by 8.0 (3)° from that of the benzene ring. Also, the mean plane of the 2-nitrobenzyl ring is twisted slightly from that of the piperazine ring, with an N-N=C-C torsion angle of -176.24 (11)°. In the crystal, pairs of weak C-HO interactions link the molecules into dimers approximately along .
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