Poly[diaquabis(mu-4,4'-bipyridine-kappa N-2: N') bis(ethane- 1,2- diol-kappa O) bis(mu- sulfato-kappa O-2:O')dicobalt(II)]

In the title compound, [Co-2(SO4)(2)(C10H8N2)(2)(C2H6O2)(2)(H2O)(2)](n), there are two crystallographically independent Co-II ions, each of which lies on a twofold rotation axis and has a slightly distorted octahedral environment. One CoII ion is coordinated by two N atoms from two bridging 4,4'-bipyridine (4,4'-bipy) ligands, two O atoms from two sulfate ions and two O atoms from aqua ligands. The second CoII ion is similar but with ethane-1,2-diol ligands in place of water molecules. The sulfate anions act as bridging ligands to link two adjacent Co II ions together, leading to the formation of linear center dot center dot center dot Co1Co2Co1Co2 center dot center dot center dot chains along the a axis. Adjacent chains are further bridged by 4,40-bipy ligands, which are also located on the twofold rotation axis, resulting in a two-dimensional layered polymer extending parallel to (001). In the crystal, the layers are linked by extensive O-H center dot center dot center dot O hydrogen-bonding interactions involving the O atoms of the water molecules and ethane-1,2-diol molecules, resulting in a three-dimensional supramolecular network.