Intermolecular interactions in three crystalline acid salts of monocarboxylic acids

Three new acid salts of two monocarboxylic acids were obtained and their crystal structure analysis performed using experimental data collected with KM-4 diffractometer. The crystal structures of hydrogen bis(sulfosalicylates) of sodium and potassium contain hydrogen-bonded acid-anion dimers of very similar geometry and are classified to type A and pseudo A of hydrogen bis(monocarboxylates). Crystalline sodium hydrogen bis(3,5-dinitrobenzoate) contains a trimer acid-anion-acid. Its structure, which differs from that of potassium salt determined earlier, is classified as type B. The role of cations and anions in the investigated structures is discussed.