2-Amino-6-chloropyridinium 3-carboxy-4-hydroxybenzenesulfonate

Abstract

In the 3-carboxy-4-hydroxybenzenesulfonate anion of the title salt, C5H6ClN2 +·C7H5O6S−, an intramolecular O—H...O hydrogen bond with an S(6) ring motif is observed. In the crystal, the anions are linked into a chain structure running along [1\overline{1}0] via an O—H...O hydrogen bond formed between the carboxy and sulfonate groups. The 2-amino-6-chloropyridinium cations bridge the anion chains via N—H...O and C—H...O hydrogen bonds, forming a sheet parallel to the ab plane. In the sheet, a C—H...Cl interaction between the cations is also observed.

Novel Salts of Heterocyclic Polyamines and 5-Sulfosalicylic Acid: Synthesis, Crystal Structure, and Hierarchical Supramolecular Interactions

“…In addition, the crystal structure of the C 7 H 5 O 6 S − and 2,3-diaminopyridinium ion pair has also been reported [24]. Moreover, a few other structures with 2-aminopyridinium ion [13] and its derivatives substituted by chloro [25,26], bromo [27] or methyl [28] group can be found in the CSD. For 2,6-diamino-9H-purin-1-ium cation, only its salts with 2-(2carboxylatophenyl)acetate and closo-dodecafluorododecaborate (B 12 F 12 2− ) anions have been described [29,30].…”