One-dimensional array of two- and three-center cation-cation bonds in the structure of Li4[(UO2)10O10(Mo2O8)]

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2007
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  • Dark-red crystals of the new compound Li4[(UO2) 10O10(Mo2O8)] (1) have been obtained by high-temperature solid-state reactions. The structure of 1 (monoclinic, P21/c, a = 7.9426(4) Å, b = 19.9895-(9) Å, c = 10.0796(5) Å, β= 90.575(2)°, V = 1600.24(13) Å3, Z = 4) consists of a framework of U and Mo polyhedra with Li+ cations in the channels. The framework contains seven-polyhedrawide uranium oxide tapes interlinked by dimers of edge-sharing [4 + 1]-distorted MoO5 polyhedra. The U-O tapes are parallel to the a axis, and their planes are oriented parallel to (021) and (021) so that they are cross-linked within the framework. The core of the tapes consists of unprecedented one-dimensional arrays of cation-cation-bonded uranyl ions. The arrays are constructed from eight-membered cycles with uranyl ions linked through two- and three-center cation-cation interactions. © 2007 American Chemical Society.
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/1fe6f0b9-a1e0-4507-b0ab-b57bd1e375a5