Synthesis and crystal structure of An(VI) complexes with cyclobutanecarboxylic acid anions and 2,2′-bipyridine [An(VI) = U, Np, Pu]

Resumo

New complexes of hexavalent U, Np, and Pu of the composition [UO₂(bipy)(cbc)₂] (I) and [AnO₂(bipy)(cbc)₂]·0.5(bipy) [An = Np (II) and Pu (III)] with cyclobutanecarboxylic acid anions C₄H₇COO^– and 2,2′-bipyridine (bipy) were synthesized, and their structures were studied. The An atoms in I–III have the coordination surrounding in the form of distorted hexagonal bipyramids with the О atoms of AnO₂²⁺ cations in the apical positions. The equatorial plane of the bipyramids is constituted by the O atoms of two C₄H₇COO^– anions and N atoms of bipy.