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

Abstract

In the title compound, C4H12N2 2+·2C6H2N3O7 -·C4H10N2, the piperazine-1,4-diium cations and piperazine mol-ecules lie on crystallographic inversion centres. In the crystal structure, inter-molecular N - H⋯O and N - H⋯N hydrogen bonds link the components to form two-dimensional layers parallel to the (001) plane. These layers are, in turn, connected by weak inter-molecular C - H⋯O hydrogen bonds and π-π stacking inter-actions [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.