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In the title compound, (C5H7N2)[NiCl3(C5H6N2)], the NiII atom is four-coordinated by three chloride anions and one N atom of a 2-aminopyridine ligand, forming a distorted tetrahedral coordination. In the crystal structure, cations and complex anions are linked into chains along the a, b and c axes by N—H...Cl hydrogen bonds, leading to the formation of a three-dimensional framework.