title: 4-Amino-pyridinium 4-carb-oxy-butano-ate.
abstract: The asymmetric unit of the title salt, C(5)H(7)N(2) (+)·C(5)H(7)O(4) (-), contains two 4-amino-pyridinium cations and two 4-carb-oxy-butano-ate anions. Each 4-amino-pyridinium cation is planar, with a maximum deviation of 0.005 (2) Å. Both 4-carb-oxy-butano-ate 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.
authors: Hoong-Kun
authors: HK
authors: Fun
authors: Madhukar
authors: M
authors: Hemamalini
authors: Venkatachalam
authors: V
authors: Rajakannan
references: Acta Crystallogr B. 2001 Jun;57(Pt 3):366-71
references: 11373396
references: Acta Crystallogr A. 2008 Jan;64(Pt 1):112-22
references: 18156677
references: Acta Crystallogr D Biol Crystallogr. 2009 Feb;65(Pt 2):148-55
references: 19171970
references: Neurology. 1997 Apr;48(4):817-21
references: 9109861