2-{[3-Methyl-4-(2,2,2-trifluoro­eth­oxy)pyridin-2-yl]methyl­sulfan­yl}-1H-benzimidazole monohydrate: a monoclinic polymorph

The title compound, C₁₆H₁₄F₃N₃OS·H₂O, which had been previously characterized in the space group P-1 [Ren et al. (2011). Acta Cryst. E67, o270], has now been crystallized from 1-propanol in the monoclinic form in the space group P2₁/c. While the triclinic form is a Z′ = 2 crystal, the new monoclinic polymorph includes one main mol­ecule and one water lattice mol­ecule in the asymmetric unit. In the crystal, the water mol­ecule is sandwiched between neighboring main mol­ecules and behaves as both donor and acceptor in O—H...N and N—H...O hydrogen bonds with the imidazole N atoms. This pattern of chains parallel to [100] further inter­acts via O—H...N(pyridine) contacts.