Acta Crystallographica Section E
Structure Reports Online
Volume 66, Part 9 (September 2010)
metal-organic compounds
Acta Cryst. (2010). E66, m1161 [ doi:10.1107/S1600536810033052 ]
Poly[diaqua-![[mu]](/logos/entities/mu_rmgif.gif)
2-oxalato-di-4-terephthalato-diytterbium(III)]
C.-X. Wang and Z.-F. Li
Abstract: The crystal structure of the title complex, [Yb2(C8H4O4)2(C2O4)(H2O)2]n, features an extended three-dimensional framework made up of Yb3+ ions coordinated by terephthalate ligands, oxalate ligands and water molecules. The Yb3+ ion has a distorted square-antiprismatic coordination formed by one aqua ligand, two O atoms from an oxalate ligand and five O atoms belonging to four terephthalate anions. Two symmetry-independent terephthalate anions, as well as the oxalate anion, occupy special positions on inversion centers. The water molecule participates in O-H
O hydrogen bonding with both terephthalate anions.
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