organic compounds
The molecular and crystal structures of three salts of the same anion, N-(2-hydroxyethyl)piperidinium 2-[(2,6-dichlorophenyl)amino]phenylacetate, C7H16NO+.C14H10Cl2NO2−, N-(2-hydroxyethyl)morpholinium 2-[(2,6-dichlorophenyl)amino]phenylacetate, C6H14NO2+.C14H10Cl2NO2−, N-(2-hydroxyethyl)piperazinium 2-[(2,6-dichlorophenyl)amino]phenylacetate, C6H15N2O+.C14H10Cl2NO2−, have been determined by X-ray diffraction. Strong anion–cation interactions via hydrogen bonds are the prime driving force for crystal self-assembly. Packing is determined by weak hydrogen-bonding interactions (C—HO and C—HCl). The three compounds are isomorphous and are characterized by the same network of hydrogen bonds. Structural results are related to the different solubilities of the three salts.