1,4-Diazoniacyclohexane bis(3-carboxypyrazine-2-carboxylate) dihydrate

Abstract

In the title compound, C4H12N22+·2C6H3N2O4−·2H2O or (1,4-dacH2)(pyzdcH)2·2H2O, the complete dication is generated by crystallographic inversion symmetry. An intramolecular O—H...O hydrogen bond occurs in the anion. In the crystal, O—H...O, O—H...N, N—H...O and N—H...N hydrogen bonds result in the formation of a three-dimensional network. Additionally, π–π stacking interactions between the pyrazine rings with centroid–centroid distances of 3.7065 (2) Å are observed.