organic compounds
The hydrogen-bonded two- and three-dimensional polymeric structures in the ammonium salts of 3,5-dinitrobenzoic acid, 4-nitrobenzoic acid and 2,4-dichlorobenzoic acid involve cation–anion N—HO hydrogen-bonded cyclic associations. The presence or absence of the ring-stacking and ring-laddering models for ammonium carboxylate structures is also tested particularly with respect to the hydrated examples.