Poly[(μ2-quinoline-3-carboxylato-κ2 N:O)(μ2-quinoline-3-carboxylato-κ3 N:O,O′)cadmium]

In the title compound, [Cd(C10H6NO2)2]n, the CdII atom is coordinated by three O atoms and two N atoms from four quinoline-3-carboxylate (L −) ligands, leading to a distorted trigonal–bipyramidal geometry. The L − ligands link the CdII atoms into a plane parallel to (100), with one ligand being tridentate, coordinating via the N atom and chelating a second Cd atom, and the other being bidentate, bridging two Cd atoms via the N and one O atom.. This two-dimensional network extends into a double-layer network by π–π interactions, with centroid–centroid distances of 3.680 (2) and 3.752 (2) Å. Another type of π–π interaction between pyridine rings [centroid–centroid distance = 3.527 (2) Å] leads to a three-dimensional supramolecular architecture.