title: Poly[diaqua-bis-(μ(3)-1H-imidazole-4,5-dicarboxyl-ato)(μ(2)-sulfato)-diytterbium(III)].
abstract: In the title compound, [Yb(2)(C(5)H(2)N(2)O(4))(2)(SO(4))(H(2)O)(2)](n), the Yb(III) ion is eight-coordinated by four O atoms and one N atom from three imidazole-4,5-dicarboxyl-ate ligands, two O atoms from one SO(4) (2-) anion (site symmetry 2), as well as one O atom of a water mol-ecule, giving a bicapped trigonal-prismatic coordination geometry. The metal coordination units are connected by bridging imidazole-4,5-dicarboxyl-ate and sulfate ligands, generating a heterometallic layer. The layers are stacked along the a axis via N-H⋯O, O-H⋯O, and C-H⋯O hydrogen-bonding inter-actions, generating a three-dimensional framework.
authors.affiliation: School of Chemistry and Environment, South China Normal University, Guangzhou 510631,  People's Republic of China.
authors.forename: Li-Cai
authors.initials: LC
authors.lastname: Zhu