Acta Cryst. (2007). E63, m1266-m1268  [ doi:10.1107/S1600536807016479 ]

Poly[[tetraaquadi-₅-fumarato-₄-fumarato-diholmium(III)] trihydrate]

N. Rahahlia, K. Aliouane, A. Guehria-Laidoudi, S. Dahaoui and C. Lecomte

Abstract: The title compound, {[Ho₂(C₄H₂O₄)₃(H₂O)₄]·3H₂O}_n, is an open framework formed of corrugated layers built up from noncentrosymmetric binuclear units extended through _1,3-bridges to give inorganic chains linked in the [100] direction. Additional connections in the [011] direction, through the ligands as spacers, give a three-dimensional structure exhibiting one-dimensional channels occupied by three solvent water molecules. The two independent water-coordinated Ho^III atoms each have a nine-coordination mode via seven O atoms from five carboxylate ligands in a tricapped trigonal prism and a monocapped square prism, respectively. Intralayer hydrogen bonds involve aqua ligands acting as donors, with carboxylate O atoms as acceptors.

Online 13 April 2007

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