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1 Publicationmu-ita2:ita2-Peroxo-bis[nitratobis(pyrrolidine-2-one)dioxouranium(VI)]
Takao, K.; Ikeda, Y.
Abstract
In crystal structure of the title compound, {[UO2NO3(C4H7NO)2]2O2}, two UO22+ ions are connected by mu-ita2:ita2-O22. An inversion center is located at the middle point of a OO bond in the O2 moiety. As a result, the centrosymmetrically expanded dimeric structure is afforded. The O2 unit shows "side-on" coordination and connects two U, i.e., mu-ita2:ita2-O2. The bond lengths between U and the axial O are 1.78 Å (mean), indicating that oxidation state of U is exclusively 6+, i.e., UO22+. Furthermore, the OO distance in the dioxygen moiety is 1.491 Å, which is typical of the peroxide, O22. Each U atom is eight-coordinate in a hexagonal-bipyramidal geometry. The coordinating atoms of nitrate, pyrrolidine-2-one and mu-ita2:ita2-O22 are located on the equatorial plane, and form an irregular hexagon. The intermolecular hydrogen bonds are found between NH of 2-pyrrolidone and the coordinating O of the same ligand in the neighboring complex.
Keywords: uranyl; peroxo; pyrrolidone; nitrate; dimer; single crystal X-ray diffraction
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Acta Crystallographica Section E 66(2010), m539-m540
ISSN: 1600-5368
Permalink: https://www.hzdr.de/publications/Publ-13895