2-Trifluoro­methyl-1H-benzimidazol-3-ium tetra­fluoro­borate–2-trifluoro­methyl-1H-benzimidazole–water (1/1/1)

The asymmetric unit of the title compound, C(8)H(6)F(3)N(2) (+)·BF(4) (−)·C(8)H(5)F(3)N(2)·H(2)O, consists of two 2-trifluoro­methyl­benzimidazole mol­ecules, each of which is protonated on a 50% basis, one tetra­fluoro­borate anion and a water mol­ecule. The two 2-trifluoromethylbenzimidazole mol­ecules thus exist as half-neutral half-cation entities. They are linked by N—H⋯N hydrogen bonds involving the half-occupancy hydrogens in each mol­ecule. The F atoms of one of the trifluoro­methyl groups are disordered over two sets of sites [in a 0.518 (14):0.482 (14) ratio], as are the F atoms of the tetra­fluoroborate anion [0.507 (14):0.493 (14) ratio]. The water mol­ecule is linked to one of the 2-trifluoro­methyl­benzimidazole mol­ecules via an N—H⋯O hydrogen bond.