Poly[(μ ₂-quinoline-3-carboxylato-κ ² N:O)(μ ₂-quinoline-3-carboxylato-κ ³N:O,O′) cadmium]

In the title compound, [Cd(C ₁₀H ₆NO ₂) ₂] _n , the Cd ^II atom is coordinated by three O atoms and two N atoms from four quinoline-3-carboxyl-ate (L ^-) ligands, leading to a distorted trigonal-bipyramidal geometry. The L ^- ligands link the Cd ^II 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 inter-actions, with centroid-centroid distances of 3.680 (2) and 3.752 (2) Å. Another type of π-π inter-action between pyridine rings [centroid-centroid distance = 3.527 (2) Å] leads to a three-dimensional supra-molecular architecture.