Crystal structure of double acetates SrAnO2(OOCCH3)3·3H2O [An = Np(V), Pu(V)] |
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| Authors: | I. A. Charushnikova N. N. Krot I. N. Polyakova Z. A. Starikova |
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| Affiliation: | (1) Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia;(2) Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia;(3) Nesmeyanov Institute of Organoelemental Compounds, Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | The crystal structure of isostructural Pu(V) and Np(V) acetates of the general composition SrAnO2Ac3 · 3H2O (Ac = CH3COO?) was determined. The structures are based on complex anions [AnO2Ac3]2? and Sr2+ cations combined into a three-dimensional framework with water molecules located in framework cavities. The An(V) atoms are characterized by the hexagonal-bipyramidal oxygen surrounding; the equatorial plane is formed by the O atoms of three acetate groups. The coordination surrounding of the Sr atom is a tetragonal antiprism formed by the O atoms of acetate ions and water molecules. The bond lengths within the coordination sphere decrease in passing from Np(V) to Pu(V): the average An=O and An-O bond lengths are 1.828(5) and 2.549(6) Å for Np and 1.811(4) and 2.530(4) Å for Pu, respectively. |
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