Abstract
Two new U(VI) compounds, [((CH3)2CHNH3)(CH3NH3)][(UO2)2(CrO4)3] (1) and [CH3NH3][(UO2)· (SO4)(OH)] (2), were prepared by combining hydrothermal synthesis with isothermal evaporation. Compound 1 crystallizes in the monoclinic system, space group Р21, a = 9.3335(19), b = 10.641(2), c = 9.436(2) Å, β = 94.040(4)°. Compound 2 crystallizes in the rhombic system, space group Рbca, a = 11.5951(8), b = 9.2848(6), c = 14.5565(9) Å. The structures of the compounds were solved by the direct methods and refined to R1 = 0.041 [for 5565 reflections with Fo > 4σ(Fo)] and 0.033 [for 1792 reflections with Fo > 4σ(Fo)] for 1 and 2, respectively. Single crystal measurements were performed at 296 and 100 K for 1 and 2, respectively. The crystal structure of 1 is based on [(UO2)2(CrO4)3]2– layers, and that of 2, on [(UO2)(SO4)(OH)]– layers. Both kinds of layers are constructed in accordance with a common principle and are topologically similar. Protonated isopropylamine and methylamine molecules are arranged between the layers in 1, and protonated methylamine molecules, in 2. Compound 1 is the second known example of a U(VI) compound templated with two different organic molecules simultaneously.
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Original Russian Text © E.V. Nazarchuk, D.O. Charkin, O.I. Siidra, V.V. Gurzhiy, 2018, published in Radiokhimiya, 2018, Vol. 60, No. 5, pp. 429–435.
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Nazarchuk, E.V., Charkin, D.O., Siidra, O.I. et al. Synthesis and Crystal Structures of New Layered Uranyl Compounds Containing Dimers [(UO2)2O8] of Edge-Linked Pentagonal Bipyramids. Radiochemistry 60, 498–506 (2018). https://doi.org/10.1134/S1066362218050041
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DOI: https://doi.org/10.1134/S1066362218050041