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

Abstract

In the two anions of the title salt, C 2H 10N 22+·2C 8H 5N 8-·2H 2O, 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 hydrogenbond network into twodimensional wavelike 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.