title: Synthesis and X-ray Crystallography of [Mg(H2O)6][AnO2(C2H5COO)3]2 (An = U, Np, or Pu).
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.
authors.affiliation: Samara National Research University , Samara, 443086, Russia.
authors.forename: Viktor N
authors.initials: VN
authors.lastname: Serezhkin
authors.affiliation: A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , Moscow, 119071, Russia.
authors.forename: Mikhail S
authors.initials: MS
authors.lastname: Grigoriev
authors.affiliation: Samara National Research University , Samara, 443086, Russia.
authors.forename: Aleksey R
authors.initials: AR
authors.lastname: Abdulmyanov
authors.affiliation: A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences , Moscow, 119071, Russia.
authors.forename: Aleksandr M
authors.initials: AM
authors.lastname: Fedoseev
authors.affiliation: Samara National Research University , Samara, 443086, Russia.
authors.forename: Anton V
authors.initials: AV
authors.lastname: Savchenkov
authors.affiliation: Samara National Research University , Samara, 443086, Russia.
authors.forename: Larisa B
authors.initials: LB
authors.lastname: Serezhkina