4,4′-Bipyridyl­ium bis(hydrogen 2,2′-di­thio­dibenzoate) dihydrate

The title compound, C10H10N22+·2C14H9O4S2−·2H2O, was obtained by the reaction of Zn(NO3)2 with 2,2′-di­thio­di­benzoic acid and 4,4′-bi­pyridine in ethanol. The compound consists of hydrogen 2,2′-di­thio­dibenzoate anions, centrosymmetric 4,4′-bipyridyl­ium cations and water mol­ecules. Hydro­gen-bonding interactions between the components lead to the formation a three-dimensional network.