Poly[[diaquacadmium(II)]-μ3-(1-carboxybenzene-3,5dicarboxylato)]

The crystal structure of the title complex, poly[[diaquacadmium(II)]-mu (3) -(1-carboxybenzene-3,5-dicarboxylato-O-1:O-3,O-3':O-5,O-5')], [Cd(C9H4O6)(H2O)(2)](n), features two-dimensional polymeric network layers which are hydrogen-bonded to one another. The Cd atom is coordinated by seven O atoms, two of which belong to water molecules arranged trans to each other, above and below the layers. Each polymeric layer is tiled with (Cd)(3)(C9O6)(3) rings formed by alternating Cd atoms and (C9O6) ligands. The layers are parallel to the (1) over bar 01 crystal plane and the neighbouring layers are separated by 3.2508 (2) Angstrom.