Synthesis and X-ray Crystallography of [Mg(H2O)6][AnO2(C2H5COO)3]2 (An = U, Np, or Pu)

Viktor N Serezhkin; Mikhail S Grigoriev; Aleksey R Abdulmyanov; Aleksandr M Fedoseev; Anton V Savchenkov; Larisa B Serezhkina

doi:10.1021/acs.inorgchem.6b01154

Synthesis and X-ray Crystallography of [Mg(H2O)6][AnO2(C2H5COO)3]2 (An = U, Np, or Pu)

Inorg Chem. 2016 Aug 1;55(15):7688-93. doi: 10.1021/acs.inorgchem.6b01154. Epub 2016 Jul 12.

Authors

Viktor N Serezhkin¹, Mikhail S Grigoriev², Aleksey R Abdulmyanov¹, Aleksandr M Fedoseev², Anton V Savchenkov¹, Larisa B Serezhkina¹

Affiliations

¹ Samara National Research University , Samara, 443086, Russia.
² A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , Moscow, 119071, Russia.

PMID: 27404584
DOI: 10.1021/acs.inorgchem.6b01154

Abstract

Synthesis and X-ray crystallography of single crystals of [Mg(H2O)6][AnO2(C2H5COO)3]2, where An = U (I), Np (II), or Pu (III), are reported. Compounds I-III are isostructural and crystallize in the trigonal crystal system. The structures of I-III are built of hydrated magnesium cations [Mg(H2O)6](2+) and mononuclear [AnO2(C2H5COO)3](-) complexes, which belong to the AB(01)3 crystallochemical group of uranyl complexes (A = AnO2(2+), B(01) = C2H5COO(-)). Peculiarities of intermolecular interactions in the structures of [Mg(H2O)6][UO2(L)3]2 complexes depending on the carboxylate ion L (acetate, propionate, or n-butyrate) are investigated using the method of molecular Voronoi-Dirichlet polyhedra. Actinide contraction in the series of U(VI)-Np(VI)-Pu(VI) in compounds I-III is reflected in a decrease in the mean An═O bond lengths and in the volume and sphericity degree of Voronoi-Dirichlet polyhedra of An atoms.