4,4′-Ethyl­enedipyridinium bis­(3,4,5-trihy­droxy­benzoate) sesquihydrate

The asymmetric unit of the title compound, C(12)H(14)N(2) (2+)·2C(7)H(5)O(5) (−)·1.5H(2)O, contains two 4,4′-ethyl­enedipyridinium cations, four gallate anions and three water mol­ecules. In the 4,4′-ethyl­enedipyridinium cations, the dihedral angles between the pyridinium rings are 4.3 (3) and 18.6 (3)°. Extensive classical N—H⋯O and O—H⋯O hydrogen bonding and weak C—H⋯O hydrogen bonding and C—H⋯π inter­actions are present in the crystal structure. π–π stacking is also observed, the centroid–centroid separations between the benzene and pyridine rings being 3.611 (3), 3.448 (3) and 3.536 (3) Å.