科研之友
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摘要
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每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.
