A new chain-like cadmium(II) coordination polymer containing chains of water molecules

The title cadmium(II) polymer, catena-poly[[[ bis(4-aminopyridine-kappa N) aquacadmium(II)]-mu- 1,4-phenylenediacetato-kappa(4) O, O': O '', O'''] dihydrate], {[Cd(C10H8O4)(C5H6N2)(2)(H2O)] center dot 2H(2)O} (n), comprises one-dimensional wave-like chains, in which the Cd atom is coordinated by 1,4-phenylenediacetate and 4-aminopyridine molecules. The 1,4-phenylenediacetate ligands lie about inversion centres. Extensive hydrogen-bonding interactions between the chains lead to a three-dimensional structure. Free water molecules form chains in the structure.