Poly[[aqua(mu(7)-ethylenediaminetetraacetato)dicadmium(II)] monohydrate]

The title compound, {[Cd(2)(C(10)H(12)N(2)O(8))(H(2)O)].H(2)O}(n), consists of two crystallographically independent Cd(II) cations, one ethylenediaminetetraacetate (edta) tetraanion, one coordinated water molecule and one solvent water molecule. The coordination of one of the Cd atoms, Cd1, is composed of five O atoms and two N atoms from two tetraanionic edta ligands in a distorted pentagonal-bipyramidal coordination geometry. The other Cd atom, Cd2, is six-coordinated by five carboxylate O atoms from five edta ligands and one water molecule in a distorted octahedral geometry. Two neighbouring Cd1 atoms are bridged by a pair of carboxylate O atoms to form a centrosymmetric [Cd(2)(edta)(2)](4-) unit located on the inversion centre, which is further extended into a two-dimensional layered structure through Cd2-O bonds. There are hydrogen bonds between the coordinated water molecules and carboxylate O atoms within the layer. The solvent water molecules occupy the space between the layers and interact with the host layers through O-H...O and C-H...O interactions.