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Acta Cryst. (2008). E64, m1433 [ doi:10.1107/S1600536808033230 ]
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3-hydroxido-(4-2-phosphonatoethanesulfonato)dierbium(III)] monohydrate]Abstract: The crystal structure of the title compound, {[Er2(C2H4O6PS)(OH)3(H2O)]·H2O}n, consists of two Er3+ ions, one (C2H4O6PS)3- ion, three OH- ions, and two water molecule. The Er3+ ions form ErO8 polyhedra., which are connected by - and 3-O atoms. Thus, inorganic Er-O-Er layers of edge- and face-sharing polyhedra are observed. Whereas most often in metal phosphonosulfonates the organic linker bridges adjacent layers, in the title compound, the (O3PC2H4SO3)3- anion is only connected to one Er-O-Er layer. Short interatomic O
O distances [2.898 (8), 2.997 (14) and 2.768 (10) Å] indicate hydrogen bonding between the layers. The noncoordinated water molecules are located between the layers.
Online 18 October 2008
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