title: Poly[[diaqua-bis-(2,2'-bipyridine)-bis-(μ(3)-5-hy-droxy-isophthalato)(μ(2)-5-hy-droxy-isophthalato)digadolinium(III)] trihydrate].
abstract: The asymmetric unit of the title coordination polymer, {[Gd(2)(C(8)H(4)O(5))(3)(C(10)H(8)N(2))(2)(H(2)O)(2)]·3H(2)O}(n), contains two Gd(III) cations, one of which is surrounded by three 5-hy-droxy-isophthalate anions, one 2,2'-bipyridine ligand and two water mol-ecules in a distorted N(2)O(7) tricapped trigonal-prismatic coordination geometry. The other Gd cation is coordinated by four 5-hy-droxy-isophthalate anions and one 2,2'-bipyridine ligand in a distorted N(2)O(7) tricapped trigonal-prismatic coordination geometry. The 5-hy-droxy-isophthalate anions bridge the Gd cations, forming a layer structure. The layers are further connected by extensive O-H⋯O hydrogen bonding, assembling a three-dimensional supra-molecular network.
authors: School of Chemistry and the Environment, South China Normal University, Guangzhou 510006,  People's Republic of China.
authors: Yan-Lin
authors: YL
authors: Zhang