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Geometric isomerism of layered complexes of uranyl selenates: Synthesis and structure of (H3O)[C5H14N]2[(UO2)3(SeO4)4(HSeO4)(H2O)] and (H3O)[C5H14N]2[(UO2)3(SeO4)4(HSeO4)(H2O)](H2O)

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Abstract

New uranyl selenates with organic cations (H3O)[C5H14N]2[(UO2)3(SeO4)4(HSeO4)(H2O)] (I) and (H3O)[C5H14N]2[(UO2)3(SeO4)4(HSeO4)(H2O)](H2O) (II) were synthesized by evaporation of aqueous solutions and studied. Compound I has monoclinic symmetry, space group C2/c, a = 16.7572(13), b = 11.7239(12), c = 19.0490(13) Å, β = 98.875(6)°, V = 3697.6(5) Å3, Z = 4. The crystal structure was solved by the direct method and refined to R 1 = 0.085 for 2868 reflections with |F hkl | ≥ 4σ|F hkl |. Compound II has monoclinic symmetry, space group P21/n, a = 10.8252(10), b = 19.0007(10), c = 18.6463(15) Å, β = 100.324(7)°, V = 3773.2(5) Å3, Z = 4. The crystal structure was solved by the direct method and refined to R 1 = 0.084 for 5721 reflections with |F hkl | ≥ 4σ|F khl |. The structures of I and II are based on layered complexes [(UO2)3(SeO4)4(HSeO4)(H2O)]3− formed by combination of uranyl pentagonal bipyramids and selenate tetrahedra. H3O+ cations, water molecules, and protonated methylbutylamine cations are located in the interlayer space. Geometric isomerism of two-dimensional complexes [(UO2)3(SeO4)5(H2O)] in the structures of uranyl selenates was found and described.

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Authors and Affiliations

  1. St. Petersburg State University, St. Petersburg, Russia

    S. V. Krivovichev

  2. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia

    I. G. Tananaev & B. F. Myasoedov

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  1. S. V. Krivovichev
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  2. I. G. Tananaev
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  3. B. F. Myasoedov
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Original Russian Text © S.V. Krivovichev, I.G. Tananaev, B.F. Myasoedov, 2006, published in Radiokhimiya, 2006, Vol. 48, No. 6, pp. 497–503.

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Krivovichev, S.V., Tananaev, I.G. & Myasoedov, B.F. Geometric isomerism of layered complexes of uranyl selenates: Synthesis and structure of (H3O)[C5H14N]2[(UO2)3(SeO4)4(HSeO4)(H2O)] and (H3O)[C5H14N]2[(UO2)3(SeO4)4(HSeO4)(H2O)](H2O). Radiochemistry 48, 552–560 (2006). https://doi.org/10.1134/S1066362206060026

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  • DOI: https://doi.org/10.1134/S1066362206060026

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