Assembly of discrete linear (H2O)5 water cluster within an entangled two-dimensional coordination network

Crystal structure ofcatena-poly[[diaquacadmium(II)]-μ-3,3′-(1,3-phenylene)diacrylato]

In the crystal of the title polymeric complex, [Cd(C₁₂H₈O₄)(H₂O)₂]_n, the Cd^II cation, located on a twofold rotation axis, is coordinated by two water mol­ecules and chelated by two phenyl­enediacrylate anions (mpda) in a distorted octa­hedral geometry. The mpda anions bridge the Cd^II cations, forming helical chains propagating along the c-axis direction. The mpba anion has twofold symmetry with two benzene C atoms located on the twofold rotation axis. In the crystal, O—H⋯O hydrogen bonds link the polymeric helical chains into a three-dimensional supra­molecular architecture.

Chiral or achiral: four isomeric Cd(ii) coordination polymers based on phenylenediacrylate ligands

The isomeric coordination polymers derived fromp- andm-phenylenediacrylates contain similar homochiral motifs (hydrogen-bonded layers or μ-O_carboxylatebridged helical chains), but only themligand, with assistance of hydrogen bonds, induces spontaneous resolution to generate 3D homochiral networks.