1-[2-(Bi­phenyl-4-yl)-2-oxoethyl]-4-(N,N-di­methyl­amino)­pyridinium bromide hemihydrate

The title compound, C₂₁H₂₁N₂O⁺·Br⁻·0.5H₂O, crystallizes in a monoclinic unit cell with two cations, two anions and one water mol­ecule in the asymmetric unit. The conformations of the two independent cations are different. The crystal packing is stabilized by O—H...Br and C—H...Br interactions and weak intermolecular C—H...O hydrogen bonds.