Poly[[bis[μ-1,2-bis(4-pyridyl)ethene]-bis(trichloroacetato)cadmium(II)] monohydrate]

In the crystal structure of the title compound, {[Cd(C₂Cl ₃O₂)₂- (C₁₂H₁₀N ₂)₂]·H₂O}n, the Cd^II ion lies on a twofold rotation axis and 1,2-bis(4-pyridyl)ethene ligands bridge symmetryrelated CdII ions, forming a two-dimensional structure. Two trichloroacetate ligands complete the coordination around the Cd^II ion, forming a distorted octahedral environment. In the crystal, solvent water molecules, which also lie on twofold rotation axes, form intermolecular O - H⋯O hydrogen bonds, which connect the two-dimensional structure into a three-dimensional network. The crystal studied was an inversion twin, the refined ratio of twin components being 0.75 (4):0.25 (4).