[Hydrogen bis(1,2,4-triazole)] 1,2,4-triazolium bis(3-carboxy-4-hydroxybenzenesulfonate) 1,2,4-triazole disolvate

Abstract

The title compound, C2H4N3+·[H(C2H3N3)2]+·2C7H5O6S−·2C2H3N3, consists of two types of 1,2,4-triazole monocation, one protonated at the 2-site lying across a twofold axis and the other protonated at the 4-site with the H atom disordered over a center of symmetry, a 5-sulfosalicylate anion and a neutral 1,2,4-triazole molecule. The component ions are linked into a three-dimensional network by a combination of N—H...O, N—H...N, O—H...O, O—H...N, C—H...O and C—H...N hydrogen bonds. In addition, benzene–benzene π–π interactions of 3.942 (2) Å [interplanar spacing = 3.390 (2) Å] and C—O...π (3.331 Å) interactions are observed.