4-Aminopyridinium 4-carboxybutanoate

Abstract

The asymmetric unit of the title salt, C5H7N2+·C5H7O4−, contains two 4-aminopyridinium cations and two 4-carboxybutanoate anions. Each 4-aminopyridinium cation is planar, with a maximum deviation of 0.005 (2) Å. Both 4-carboxybutanoate anions adopt an extended conformation. In the crystal structure, the cations and anions are linked via N—H...O, O—H...O and C—H...O hydrogen bonds, forming a two-dimensional network parallel to the bc plane.