title: 2,2'-Imino-diethanaminium 2,2'-(disulfanyldi-yl)dibenzoate dihydrate.
abstract: In the title hydrated salt, C(4)H(15)N(3) (2+)·C(14)H(8)O(4)S(2) (-)·2H(2)O, the dication (with both terminal -NH(2) groups protonated) adopts a U-shaped conformation, the N(amine)-C-C-N(aza-nium) torsion angles being 57.9 (6) and 60.3 (6)°. The dianion is twisted: the central C-S-S-C torsion angle is 81.3 (2)° and the dihedral angle between the benzene rings is 85.4 (3)°. In the crystal, a chain in the a-axis direction mediated by water-carboxyl-ate O-H⋯O hydrogen bonds through a sequence of alternating 12-membered {⋯OCO⋯HOH}(2) and eight-membered {⋯O⋯HOH}(2) synthons occurs, which involves only one of the carboxyl-ate residues. The second carboxyl-ate residue participates in N-H⋯O hydrogen bonding, generating a three-dimensional network, along with aza-nium-water N-H⋯O hydrogen bonds.
authors.forename: Grant A
authors.initials: GA
authors.lastname: Broker
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink