3,3′-[1,2-Phenylenebis(methylene)]bis(1-ethylbenzimidazolium) dibromide

In the title molecular salt, C26H28N42+center dot 2Br center dot(-), the central benzene ring makes dihedral angles of 76.75 (11) and 82.40 (10)degrees with the pendant benzimidazole rings. The corresponding angle between the benzimidazole rings is 57.03 (9)degrees. In the crystal, the cations and anions are linked via C-H center dot center dot center dot Br hydrogen bonds, forming sheets lying parallel to the bc plane. The crystal structure also features weak C-H center dot center dot center dot pi interactions.