catena-Poly[[dichloridomercury(II)]-μ-{N-[(E)-pyridin-2-yl­methyl­idene-κN]pyridin-3-amine-κ²N¹:N³}]

In the title coordination polymer, [HgCl₂(C₁₁H₉N₃)]_n, the Hg^II ion is coordinated by three N atoms from two N-[(E)-pyridin-2-yl­methyl­idene]pyridin-3-amine (L) ligands and two chloride anions in a distorted trigonal–bipyramidal geometry. The two pyridine rings in L form a dihedral angle of 50.0 (2)°. L ligands bridge adjacent HgCl₂ units into polymeric chains propagating in [010]. The crystal packing is further stabilized by weak inter­molecular C—H...Cl hydrogen bonds and π–π inter­actions between the pyridine rings, with a centroid–centroid separation of 3.529 (9) Å.