title: 3,4-Diamino-pyridinium hydrogen succinate.
abstract: In the title compound, C(5)H(8)N(3) (+)·C(4)H(5)O(4) (-), the pyridine N atom of the 3,4-diamino-pyridine mol-ecule is protonated. The protonated N atom participates in an N-H⋯O hydrogen bond to a succinate O atom of the singly deprotonated succinate anion. Each of the two amino groups are hydrogen-bonded to the O atoms of two different sets of succinate groups.. The crystal structure is further stabilized by O-H⋯O and C-H⋯O hydrogen bonds.
authors.affiliation: X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 Universiti Sains Malaysia, Penang, Malaysia.
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun
authors.forename: Kasthuri
authors.initials: K
authors.lastname: Balasubramani