A one-dimensional CdIIcoordination polymer: poly[[[bis[methanolcadmium(II)]-μ2-aqua]-bis(μ3-pyridine-2,6-dicarboxylato-κ5O:O,N,O′:O′)]

In the title complex, [Cd2(C7H3NO4)2(CH3OH)2(H2O)]n, each Cd atom has a penta­gonal–bipyramidal geometry (CdNO6). The anionic pyridine-2,6-dicarboxyl­ate (pydc) ligands adopt a κ5O:O,N,O′:O′ coordination mode. Two symmetry-related CdII centers are linked by a pair of carboxyl­ate groups from two pydc ligands as well as a bridging oxygen from a water mol­ecule located on a twofold axis, to form a dinuclear unit. These dinuclear units are further connected via carboxyl­ate O atoms to build a one-dimensional polymeric chain. O—H⋯O hydrogen bonds are observed within this chain.