catena-Poly[[[triaquasulfatocobalt(II)]-mu-4,4'-bipyridine] ethane-1,2-diol solvate].

In the title compound, {[Co(SO4)(C10H8N2)(H2O)3].C2H6O2}n, each CoII center is octahedrally coordinated by two N atoms from two bridging 4,4'-bipyridine (bipy) ligands and four O atoms, one from a monodentate sulfate ligand and three from aqua ligands. The bipy ligands occupy special positions of site symmetry -1 and bridge adjacent cobalt(II) centers to form one-dimensional linear coordination chains. Adjacent chains are arranged in a cross-like fashion around the mid-point of the bipy ligands, resulting in a three-dimensional supramolecular array.