A new two-dimensional Cd^II coordination polymer constructed by pyrazine-2,3-dicarboxyl­ate

In the title compound, poly[μ₅-pyrazine-2,3-dicarboxyl­ato-cadmium(II)], [Cd(C₆H₂N₂O₄)]_n or [Cd(pdc)]_n, where pdc is the pyrazine-2,3-dicarboxyl­ate anion, the Cd^II atom is six-coordinated by five carboxyl­ate O atoms and one N atom from five different pdc ligands in a distorted octa­hedral CdO₅N coordination geometry. Two Cd^II atoms are bridged by carboxyl­ate groups of the pdc ligands to create a dimeric unit. The dimeric units are further connected by the pdc ligands to generate an inter­esting two-dimensional structure.