organic compounds
Open access
In the 5-chlorosalicylate anion of the title salt, C5H6BrN2+·C7H4ClO3−, an intramolecular O—HO hydrogen bond with an S(6) graph-set motif is formed, so that the anion is essentially planar with a dihedral angle of 1.3 (5)° between the benzene ring and the carboxylate group. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms via a pair of N—HO hydrogen bonds, forming an R22(8) ring motif. The crystal structure also features N—HO and weak C—HO interactions, resulting in a layer parallel to the (10-1) plane.
organic compounds
Open access
The asymmetric unit of the title salt, C10H11N2+·C4H5O4−, consists of two independent 5-amino-6-methylquinolin-1-ium cations and two 3-carboxypropanoate anions. Both cations are protonated at the pyridine N atoms and are essentially planar, with maximum deviations of 0.026 (3) and 0.016 (2) Å. In the crystal, the cations and anions are linked via N—HO and O—HO hydrogen bonds, forming a layer parallel to the ab plane. In the layer, weak C—HO hydrogen bonds and π–π stacking interactions, with centroid-to-centroid distances of 3.7283 (15) and 3.8467 (15) Å, are observed. The crystal structure also features weak C—HO hydrogen bonds between the layers.