Poly[bis-[μ(2)-2-(2-pyridylmethyl-amino)ethanesulfonato]cadmium(II)].

The title compound [Cd(C(8)H(11)N(2)O(3)S)(2)](n), is a two-dimensional coordination polymer based on a Cd(2+) atom and deprotonated 2-(2-pyridylmethyl-amino)ethanesulfonic acid (Hpmt). The complex has mol-ecular symmetry C(i) as a consequence of the Cd(II) being located on an inversion centre. Two N atoms of each pmt(-) ligand coordinate to the Cd(2+) ion and its sulfonate O atom bonds to an adjacent Cd(2+) ion. 24-membered (-Cd-N-C-C-S-O-)(4) rings are formed between neighbouring Cd(2+) ions; these are inter-connected, forming a two-dimensional layer structure. In respect to stereogenic amino N atom and the inversion symmetry of the complex, the compound is a 1:1 racemate. The crystal packing is stabilized by inter-molecular N-H⋯O hydrogen bonds and further connected by π-π stacking inter-actions between the pyridyl rings [average inter-planar distance and centroid-centroid separation = 3.582 (1) and 3.634 (1)Å, respectively], forming a three-dimensional supra-molecular architecture.