2-Carboxypyridinium Chloride Monohydrate

Article abstract of DOI:10.1107/S0108270195000175

The structure of the monohydrated polymorph of picolinic acid hydrochloride, C6H6NO2⁺*Cl^-*H2O, has been determined and the role of the lattice water in the hydrogen bonding to the chloride ion considered.In the anhydrous complex of the same compound, an interaction between the chloride and the pyridinium proton is found .In addition, the water of hydration forms bridging links between chloride ions and with a carboxylic acid H atom .An itramolecular hydrogen bond between the carboxyl O atom and the H atom of the pyridinium moiety is also found .