Dichlorido[(1R,2R)-N-(pyridin-2-yl­methyl)cyclo­hexane-1,2-diamine-κ³N,N′,N′′]mercury(II)

In the title compound, [HgCl₂(C₁₂H₁₉N₃)], the Hg^II ion is coordinated by three N atoms of the (1R,2R)-N-(pyridin-2-ylmeth­yl)cyclo­hexane-1,2-diamine ligand and by a Cl atom in the basal plane, and by a second Cl atom in the apical position, within a distorted square-pyramidal geometry. The coordination of the enanti­opure ligand to the metal atom renders the central N atom chiral with an S configuration, so the complex is enanti­omerically pure and corresponds to the S,R,R diastereoisomer. Mol­ecules are linked via weak N—H...Cl hydrogen bonds into a one-dimensional hydrogen-bonding supramolecular chain along the crystallographic b axis.