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International Union of Crystallography, Acta Crystallographica Section E: Structure Reports Online, 1(69), p. m52-m52, 2012

DOI: 10.1107/s160053681205026x

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Poly[[tetra­aquadi-μ4-fumarato-μ2-oxalato-dierbium(III)] tetra­hydrate]

Journal article published in 2012 by Qing-Feng Yang, Xiao-Zhong Wang, Ping Xue
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The title compound, {[Er2(C4H2O4)2(C2O4)(H2O)4]·4H2O}n, was synthesized by the reaction of erbium nitrate hexa­hydrate with fumaric acid and oxalic acid under hydro­thermal conditions. The Er3+ cation (site symmetry .2) is eight-coordinated by six O atoms from four fumarate anions (site symmetry .2) and one bidentate oxalate anion (site symmetry 222), and by two water mol­ecules. The complex exhibits a three-dimensional structure consisting of oxalate pillared Er–fumarate layers with channels occupied by coordinating and lattice water mol­ecules. The three-dimensional structure features by Owater—H⋯O hydrogen bonds involving both the coordinating and lattice water mol­ecules.