Poly[[diaquabis(2,2′-bipyridine-κ2N,N′)(μ3-5-hydroxyisophthalato-κ5O1,O1′:O3,O3′:O3′)(μ3-5-hydroxyisophthalato-κ4O1,O1′:O3:O3′)(μ2-5-hydroxyisophthalato-κ3O1,O1′:O3)didysprosium(III)] dihydrate]

The polymeric title compound, {[Dy-2(C8H4O5)(3)(C10H8N2)(2)(H2O)(2)]center dot 2H(2)O}(n), contains two independent Dy-III ions, both of which are nine-coordinated in a distorted tricapped trigonal-prismatic geometry. One Dy-III ion is coordinated by five 5-hydroxyisophthalate (hip) ligands and one 2,2'-bipyridine (bpy) ligand and the other by three hip ligands, one bpy ligand and two water molecules. The Dy-III ions are bridged by the carboxylate groups of the hip ligands, forming a three-dimensional framework. O-H center dot center dot center dot O hydrogen bonds are present in the crystal structure.