RESUMO
In the title salt, C15H12FN2O+·Cl-·H2O, the imidazo[1,2-a]pyridin-1-ium ring system of the cation is almostly planar [maximum deviaition = -0.047â (2)â Å for the ring C atom with the attached arene ring] and forms a dihedral angle of 61.81â (6)° with the plane of the fluoro-phenyl ring. In the crystal, water mol-ecules form an R 2 4(8) motif parallel to the (100) plane by bonding with the chloride ions via O-Hâ¯Cl hydrogen bonds. The cations are connected along the b axis via N-Hâ¯O hydrogen bonds involving the O atoms of water mol-ecules, and C-Hâ¯O, C-Hâ¯Cl and π-π inter-actions [centroid-to-centroid distance = 3.6195â (8)â Å] form layers parallel to the (100) plane. Furthermore, these layers are connected via π-π inter-actions [centroid-to-centroid distance = 3.8051â (9)â Å] that further consolidate the crystal structure.