title: catena-Poly[(μ(2)-3-carb-oxy-5-nitro-benzoato)(μ(3)-5-nitro-benzene-1,3-dicarboxyl-ato)(1,10-phenanthroline)gadolinium(III)].
abstract: The crystal structure of the title complex, [Gd(C(8)H(3)NO(6))(C(8)H(4)NO(6))(C(12)H(8)N(2))](n), contains polymeric chains made up of Gd(III) atoms, 1,10-phenanthroline and fully or half-deproton-ated 5-nitro-benzene-1,3-dicarb-oxy-lic acid (H(2)L) ligands. The Gd(III) atom is coordinated in a distorted bicapped trigonal-prismatic fashion by six O atoms from two HL(-) and three L(2-) ligands, and by two N atoms from the 1,10-phenanthroline ligand. The L(2-) ligands bridge the Gd-phenanthroline units, forming chains running parallel to [100]. O-H⋯O hydrogen bonding as well as π-π stacking inter-actions with an inter-planar distance of 3.599 (2) Å assemble neighboring polymeric chains.
authors.forename: Jun
authors.initials: J
authors.lastname: Wang
authors.forename: Zhi-Li
authors.initials: ZL
authors.lastname: Fang