catena-Poly[[[bis-(quinoxaline-2-carboxyl-ato-κ2 N 1,O)zinc(II)]-μ2-1,2-bis-(pyridin-4-yl)ethene-κ2 N:N'] hemihydrate].

The title complex, {[Zn(C9H5N2O2)2(C12H10N2)]·0.5H2O} n , has six-coordinate ZnII ions with two trans-bidentate quinoxaline-2-carboxyl-ato ligands and a bridging 1,2-bis-(pyridin-4-yl)ethyl-ene ligand, resulting in polymeric chains along the [101] direction. The offset packing of these one-dimensional chains gives rise to inter-chain H⋯O and H⋯ring inter-actions.