Two cadmium coordination polymers with bridging acetate and phenyl­enedi­amine ligands that exhibit two-dimensional layered structures

Poly[tetra-μ2-acetato-κ8O:O′-bis­(μ2-benzene-1,2-di­amine-κ2N:N′)dicadmium], [Cd2(CH3COO)4(C6H8N2)2]n, (I), and poly[(μ2-acetato-κ2O:O′)(acetato-κ2O,O′)(μ2-benzene-1,3-di­amine-κ2N:N′)cadmium] hemihydrate], {[Cd(CH3COO)2(C6H8N2)]·0.5H2O}n, (II), have two-dimensional polymeric structures in which monomeric units are joined by bridging acetate and benzenedi­amine ligands. Each of the CdII ions has an O4N2 coordination environment. The coordination geometries of the symmetry-independent CdII ions are distorted octa­hedral and distorted trigonal anti­prismatic in (I) and distorted anti­prismatic in (II). Both compounds exhibit an intra­layer hydrogen-bonding network. In addition, the water of hydration in (II) is involved in inter­layer hydrogen bonding.