Ethane-1,2-diaminium bis{5-[4-(1H-tetrazol-5-yl)phenyl]tetrazolide} dihydrate

Abstract

In the two anions of the title salt, C2H10N22+·2C8H5N8−·2H2O, the central aromatic rings make dihedral angles of 13.53 (6) and 6.53 (7)° with the deprotonated tetrazole rings, and 11.39 (6) and 10.41 (9)° with the other tetrazole groups. In the crystal, the cations, anions and water molecules are linked by an extensive O—H...N, N—H...O and N—H...N hydrogen-bond network into two-dimensional wave-like duplex sheets extending parallel to the bc plane. π–π stacking interactions between benzene rings [intercentroid distances are 3.8482 (4) and 3.9621 (5) Å] and between tetrazole rings [intercentroid distances are 3.4350 (4) and 3.7169 (4) Å] further consolidate the crystal structure.