Poly[[aqua(4,4'-diazenediyldibenzoato-kappa4O,O':O'',O''')cadmium(II)]: a twofold interpenetrated three-dimensional coordination polymer of PtS topology.

In the title coordination compound, [Cd(C14H8N2O4)(H2O)]n, the Cd(II) cation and the coordinated water molecule lie on a twofold axis, whereas the ligand lies on an inversion center. The Cd(II) center is five-coordinated in a distorted square-pyramidal geometry by four carboxylate O atoms from four different 4,4'-diazenediyldibenzoate (ddb) anions and one water O atom. The three-dimensional frameworks thus formed by the bridging ddb anions interpenetrate to generate a three-dimensional PtS-type network. Additionally, the coordination water molecule and the carboxylate O atom form a hydrogen-bonding interaction, stabilizing the three-dimensional framework structure.