3,3 '-(p-Phenylenedimethylene)diimidazol-1-ium bis(3-carboxy-4-hydroxybenzenesulfonate) dihydrate

In the title compound, C14H16N42+center dot 2C(7)H(5)O(6)S(-)center dot 2H(2)O, the 3,3 '-(p-phenylenedimethylene)diimidazol-1-ium dication lies on a crystallographic inversion center. In the crystal structure, dications, anions and solvent water molecules are linked via O-H center dot center dot center dot O, N-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds, and C-H center dot center dot center dot pi interactions, forming a three-dimensional network containing R-2(2)(4), R-2(4)(12), R-4(4)(22), R-8(10)(32) and R-12(14)(66) ring motifs.