Acta Cryst. (2006). E62, m3333-m3335  [ doi:10.1107/S1600536806047143 ]

An Eu-based metal-organic framework: poly[[tris(₄-benzene-1,4-dicarboxylato)bis(₂-N,N-diethylformamide)dieuropium(III)] 0.7-hydrate]

H. F. Clausen, J. Overgaard, R. D. Poulsen, W. Morgenroth and B. B. Iversen

Abstract: The crystal structure of the title compound, {[Eu₂(C₈H₄O₄)₃(C₅H₁₁NO)₂]·0.7H₂O}_n, consists of chains formed by Eu atoms connected by the carboxylate groups of the benzene-1,4-dicarboxylate (BDC) linker. The chains are interconnected by BDC linkers, generating a three-dimensional framework with large voids. The Eu atoms are coordinated by seven carboxylate O atoms and one solvent O atom in a sterically constrained manner due to the carboxylate group rigidity, and this causes the coordination to be distorted dodecahedral. The ethyl groups of the solvent ligand are disordered in the void. The elongated Eu-O bond to the solvent indicates that it is loosely bound to the framework, and hence solvent exchange may be possible. In the void there is additionally one partly occupied disordered water molecule.

Online 15 November 2006

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