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 HgII 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