2,3-Diamino­pyridinium (2E,4E)-hexa-2,4-dienoate

In the title salt, C(5)H(8)N(3) (+)·C(6)H(7)O(2) (−), the pyridine N atom of the 2,3-diamino­pyridine mol­ecule is protonated. The 2,3-diamino­pyridinium cation is essentially planar, with a maximum deviation of 0.068 (2) Å for one of the amino N atoms. The sorbate anion adopts an extended conformation. In the crystal structure, the protonated N atom and one of the two amino-group H atoms are hydrogen bonded to the sorbate anion through a pair of N—H⋯O hydrogen bonds, forming an R (2) (2)(8) ring motif. The ion pairs are further connected via inter­molecular N—H⋯O and C—H⋯O hydrogen bonds, forming two-dimensional networks parallel to (100).