Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): S. Alfred Cecil Raj, A. Sinthiya, Babu Varghese.
In the title hydrated salt, C5H7N2+·C6H9O4−·H2O, the carboxy H atom is disordered over two positions with equal occupancy. In the crystal, O atoms of the 5-carboxypentanoate anion link the 4-aminopyridinium cations and water molecules into a three-dimensional network via N—H⋯O hydrogen bonds. The crystal structure is further consolidated by O—H⋯O hydrogen bonds involving the anion and the solvent water molecule.
For the biological activity of 4-aminopyridine, see: Judge & Bever (2006 ▶); Schwid et al. (1997 ▶); Strupp et al. (2004 ▶). For related structures, see: Anderson et al. (2005 ▶); Chao & Schempp (1977 ▶); Goswami & Ghosh (1997 ▶).