Poly[(μ₃-pyridine-4-carboxyl­ato-κ³O:O′:N)(pyridin-1-ium-4-carboxyl­ato-κO)(thio­cyanato-κN)cobalt(II)]

In the title compound, [Co(C₆H₅NO₂)(NCS)(C₆H₄NO₂)]_n, the Co²⁺ cation is coordinated by one N and two O atoms of three bridging pyridine-4-carboxyl­ate anions, one O atom of one zwitterionic pyridinium-4-carboxyl­ate ligand and one terminal N-bonding thio­cyanate anion within a distorted N₂O₃ trigonal bipyramid. The bridging coordination mode of the ligands leads to the formation of layers parallel to (-101). N—H...O hydrogen-bonding inter­actions within the layers and S...S contacts of 3.257 (3) Å between the layers lead to the cohesion of the structure.