Synthesis and study of Np(V) and Pu(V) benzoate complexes with bipyridine

Research paper by A. A. Bessonov, N. N. Krot, M. S. Grigor’ev, V. I. Makarenkov

Indexed on: 06 May '08Published on: 06 May '08Published in: Radiochemistry


Heteroligand compounds AnO2(bipy)OOCC6H5 (An = Np, Pu; bipy = α,α-bipyridine, C10H8N2) were synthesized and studied. It follows from powder X-ray patterns that these compounds are isostructural. Their unit cell parameters, determined by indexing of the powder X-ray patterns, are as follows: a = 9.2162 (7), b = 10.2339(8), c = 17.4083(17) Å, and β = 96.48(1)° for Np and a = 9.1983(18), b = 10.2052(18), c = 17.370(3) Å and β = 96.51(1)° for Pu. The compounds crystallize in the monoclinic system space group P21/n, Z = 4. The electronic absorption spectra of crystalline compounds suggest pentagonal-bipyramidal surrounding of the central atom and the prescence of cation-cation bonds with AnO2+ ions acting as monodentate ligands with respect to each other. The IR spectra of the compounds were recorded, and their thermal behavior in air was studied.