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 Cd^IIions has an O₄N₂coordination environment. The coordination geometries of the symmetry-independent Cd^IIions 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.