Acta Cryst. (2008). E64, o665-o666  [ doi:10.1107/S1600536808005710 ]

Three-dimensional network in piperazine-1,4-diium-picrate-piperazine (1/2/1)

Z.-L. Wang and L.-H. Jia

Abstract: In the title compound, C₄H₁₂N₂²⁺·2C₆H₂N₃O₇^-·C₄H₁₀N₂, the piperazine-1,4-diium cations and piperazine molecules lie on crystallographic inversion centres. In the crystal structure, intermolecular N-HO and N-HN hydrogen bonds link the components to form two-dimensional layers parallel to the (001) plane. These layers are, in turn, connected by weak intermolecular C-HO hydrogen bonds and - stacking interactions [centroid-centroid distance between parallel aryl rings = 3.764 (2) Å, interplanar spacing = 3.500 (2) Å and ring offset = 1.387 (2) Å], forming a three-dimensional framework.

Online 5 March 2008

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