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In the title coordination polymer, [HgCl 2 (C 11 H 9 N 3 )]  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 HgCl 2  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.

acta crystallographica. section e

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