Synthesis and Structure of U(VI), Np(VI), and Pu(VI) 2-Fluorobenzoates |
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Authors: | Serezhkin V N Grigor’ev M S Fedoseev A M Budantseva N A Serezhkina L B |
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Affiliation: | 1.Samara National Research University, ul. Akademika Pavlova 1, Samara, 443011, Russia ;2.Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, korp. 4, Moscow, 119071, Russia ; |
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Abstract: | The compounds NH4AnO2(C6H4FCOO3], where An = U (I), Np (II), or Pu (III), CgH4COO? is the 2-fluorobenzoate anion, were synthesized and studied by single crystal X-ray diffraction. Compounds I–III are isostructural and crystallize in the cubic system, space group P213, Z = 4. The main structural units of I–III are mononuclear complexes AnO2(C6H4COO)3]? belonging to crystal-chemical group AB31 (A = AnO22+, B01 = C6H4FCOO?). The actinide contraction in the structures of I–III is manifested in a regular decrease in the lengths of the An=0 bonds in the AnO22+ cations and in the volumes of the Voronoi-Dirichlet polyhedra (VDPs) of the An atoms in the series U-Np-Pu. The intermolecular interactions in crystal structures of I–III were analyzed by the method of molecular VDPs. |
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