Crystal structure of complexes of Np(VI) and Pu(VI) perchlorates with triphenylphosphine oxide, [NpO2(OP(C6H5)3)4](ClO4)2 and [PuO2(OP(C6H5)3)4](ClO4)2 |
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| Authors: | I. A. Charushnikova N. N. Krot Z. A. Starikova I. N. Polyakova |
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| Affiliation: | (1) Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia;(2) Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Moscow, Russia;(3) Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia |
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| Abstract: | Single crystals of [NpO2(TPPO)4](ClO4)2 and [PuO2(TPPO)4](ClO4)2 isostructural to the complex [UO2(TPPO)4](ClO4)2 [TPPO = OP(C6H5)3] studied previously were prepared, and the structures of these compounds were determined. The coordination polyhedron of these compounds is a tetragonal bipyramid. The geometric characteristics of the tetragonal bipyramids in the compounds are practically the same despite the actinide contraction of the central atoms, whereas the unit cell volume decreases in the series U-Np-Pu. The equality of the volumes of the coordination polyhedra of the U, Np, and Pu atoms is attributed to the influence of TPPO containing phenyl radicals with negative effective charge. Original Russian Text ? I.A. Charushnikova, N.N. Krot, Z.A. Starikova, I.N. Polyakova, 2007, published in Radiokhimiya, 2007, Vol. 49, No. 5, pp. 407–411. |
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