1,1'-Methyl-enebis{4-[( E )-2-(pyridin-4-yl)ethen-yl]pyridinium} dibromide dihydrate.

The chevron-shaped cations of the title hydrated salt, C 25 H 22 N 4 2+ ·2Br - ·2H 2 O, are arranged in back-to-back alternating directions to form a zigzag ribbon propagating along the [010] direction. Inter-molecular inter-actions comprising these ribbons are π-π inter-actions between the pyridinium and adjacent pyridyl rings, as well as O-H⋯O hydrogen bonding between water molecules and two adjacent pyridyl N atoms. Half of the cation is generated by the mirror plane. The water O atoms, the central C atom and one Br atom are located on this mirror plane while the other Br atom is on a twofold screw axis.