4-Hydroxy-1,2,6-trimethylpyridinium bromide monohydrate

Abstract

The title salt, C8H12NO+·Br -·H2O, is isomorphous with the chloride analogue [Seethalakshmi et al. (2013). Acta Cryst. E69, o835-o836]. In the solid state, the cations, anions and water molecules are interlinked by a network of O - H⋯O, O - H⋯Br and C - H⋯Br interactions. The water molecule makes two O - H⋯Br hydrogen bonds, generating [010] zigzag chains of alternating water molecules and bromide anions. The cation is involved in two intermolecular C - H⋯Cl interactions in the chloride salt, whereas three intermolecular C - H⋯Br interactions are observed in the title bromide salt. This additional intermolecular C - H⋯Br interaction links the adjacent water and bromide zigzag chains via cationic molecules. In addition, weak π-π stacking interactions are observed between pyridinium rings [centroid-centroid distance = 3.5664 (13) Å]. © Seethalakshmi et al. 2013.