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Cobalt and Calcium Methacrylatouranylates: Synthesis and Structure

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Abstract

Two new uranyl complexes are synthesized: [Co(H2O)6][UO2(Mac)3]2·8H2O (I) and {Ca(H2O)2[UO2(Mac)3]2} (II) (Mac is methacrylate ion CH2C(CH3)COO–). The crystals of complexes I and II are studied by the X-ray diffraction method (CIF files CCDC nos. 2124087 (I) and 2124088 (II)) and IR spectroscopy. The uranyl-containing structural units of the crystals of compounds I and II are mononuclear complexes [UO2(Mac)3]– with the crystal chemical formula \({\text{AB}}_{3}^{{01}}\) (A = \({\text{UO}}_{2}^{{2 + }},\) B01 = Mac). In the crystals of complex I, the [UO2(Mac)3]– complexes coexist with octahedral aqua complexes [Co(H2O)6]2+ and outer-sphere water molecules. In the crystals of complex II, each calcium ion binds two water molecules and two [UO2(Mac)3]– anions to form trinuclear electroneutral complexes {Ca(H2O)2(UO2)2(Mac)6} with the crystal chemical formula \({\text{A}}{\kern 1pt}' {\text{M}}_{2}^{1}{{{\text{A}}}_{{\text{2}}}}{\text{B}}_{2}^{{01}}{\text{B}}_{4}^{{11}}\) (A' = Ca2+, A = \({\text{UO}}_{2}^{{2 + }}{\text{,}}\) B01 and B11 = Mac, M1 = H2O). In compound II, the uranium-containing complexes are joined into a 3D framework through intermolecular contacts, which are characterized using the method of molecular Voronoi–Dirichlet polyhedra.

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Funding

The XRD studies were carried out at the Center for Collective Use “Physical Investigation Methods” of the Frumkin Institute of Physical Chemistry and Electrochemistry (Russian Academy of Sciences) and were supported in part by the Ministry of Science and Higher Education of the Russian Federation (theme no. 122011300061-3). N.A. Shimin acknowledges the support of the Russian Science Foundation (project no. 20-73-10250).

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Authors and Affiliations

  1. Samara National Research University, Samara, Russia

    V. N. Serezhkin, N. A. Shimin & L. B. Serezhkina

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

    M. S. Grigoriev

Authors
  1. V. N. Serezhkin
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  2. N. A. Shimin
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  3. M. S. Grigoriev
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  4. L. B. Serezhkina
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Correspondence to V. N. Serezhkin or L. B. Serezhkina.

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Translated by E. Yablonskaya

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Serezhkin, V.N., Shimin, N.A., Grigoriev, M.S. et al. Cobalt and Calcium Methacrylatouranylates: Synthesis and Structure. Russ J Coord Chem 48, 579–585 (2022). https://doi.org/10.1134/S1070328422090032

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