Poly[tetraaqua-μ4-squarato-di-μ3-squarato-disamarium(III)]

The structure of the title compound, [Sm2(C4O4)3(H2O)4]n, consists of infinite-chain structural units, built from edge-sharing samarium SmO7(H2O)2 polyhedra and linked via bis-monodendate squarate (sq1) groups. The chains extend along [100] in a zigzag mode and are interconnected by bis-chelating sq...

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Bibliographic Details
Published in:Acta crystallographica. Section E, Structure reports online Structure reports online, 2008-12, Vol.64 (12), p.m1566-m1567
Main Authors: Thierry Roisnel, Hocine Merazig, Patricia Bénard-Rocherullé, Sofiane Bouacida, Hocine Akkari
Format: Article
Language:English
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Summary:The structure of the title compound, [Sm2(C4O4)3(H2O)4]n, consists of infinite-chain structural units, built from edge-sharing samarium SmO7(H2O)2 polyhedra and linked via bis-monodendate squarate (sq1) groups. The chains extend along [100] in a zigzag mode and are interconnected by bis-chelating squarate (sq2) ligands into layers parallel to (101). Interlayer hydrogen bonds strengthen the cohesion of the three-dimensional network. The samarium cation is coordinated by four O atoms from sq1 units and three O atoms from sq2 units, in addition to two water O atoms. The best representation of the samarium SmO7(H2O)2 polyhedron is distorted tricapped trigonal-prismatic. The sq1 ligand has one metal-free O atom and relates three Sm atoms in a bis-monodentate and chelation fashion, the second squarate, sq2, is strictly centrosymmetric and acts as a bis-chelating ligand.
ISSN:1600-5368
1600-5368
DOI:10.1107/S160053680803674X