4-Amino­pyridinium cis-2-carb­oxy­cyclo­hexane-1-carboxyl­ate

TLDR: In the structure of the title molecular salt, C5H7N2 +·C8H11O4 −, the cis monoanions associate through short O—H⋯O hydrogen bonds in the carboxylic acid groups, forming zigzag chains which extend along the c axis.

Abstract: In the structure of the title compound, C5H7N2+·C8H11O4−, the cis anions associate through head-to-tail carb­oxy­lic acid–carboxyl O—H⋯O hydrogen bonds [graph set C(7)], forming chains which extend along c and are inter­linked through the carboxyl groups, forming cyclic R22(8) associations with the pyridinium and an amine H-atom donor of the cation. Further amine–carboxyl N—H⋯O inter­actions form enlarged centrosymmetric rings [graph set R44(18)] and extensions down b, giving a three-dimensional structure.