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I. A. Charushnikova, N. N. Krot, Z. A. Starikova

Cation–cation interaction in crystal structures of Np(V) and Pu(V) benzoate complexes with 2,2′-bipyridine, [NpO₂(C₁₀H₈N₂)(OOCC₆H₅)]₂ and [PuO₂(C10

Keywords: Actinides, Neptunium, Plutonium, Benzoates, Bipyridine

Single crystals of the Np(V) and Pu(V) benzoate complexes with 2,2′-bipyridine were prepared. According to X-ray diffraction analysis data, they are isostructural neutral dimers with the [AnO₂(C₁₀H₈N₂)(OOCC₆H₅)]₂ (An=Np or Pu) composition. In crystals of these compounds the AnO₂⁺ are linked to each other in pairs, acting simultaneously as ligands and coordinating centers. Due to the cation-cationic interaction the dimeric An₂O₄²⁺ cations are formed with the very short An···An distance equal to 3.4281(5) and 3.4088(14)Å for Np and Pu, respectively. The [NpO₂(C₁₀H₈N₂)(OOCC₆H₅)]₂ complex is a new representative of compounds containing a very rare system of cation–cation bonds in the structure. The cation–cation bonds and the [Pu₂O₄²⁺ dimeric cations in the PuO₂(C₁₀H₈N₂)(OOCC₆H₅)]₂ structure have been found for the first time.

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Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 95, 09/2007
Pages: 495 - 500

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