Acta Cryst. (2013). E69, o1241 [ doi:10.1107/S1600536813018801 ]
Abstract: The asymmetric unit of the title compound, C8H10N6O2, contains one-half molecule, which is completed by a crystallographic center of symmetry. The piperazine ring adopts a chair conformation. In the crystal, weak C-HO interactions link the molecules into layers parallel to the bc plane. The crystal packing also exhibits short NN contacts of 3.0467 (16) Å between the terminal diazo N atoms from neighbouring molecules.
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