作者:Inga M. Aladzheva、Olga V. Bykhovskaya、Yulia V. Nelyubina、Zinaida S. Klemenkova、Pavel V. Petrovskii、Irina L. Odinets
DOI:10.1016/j.ica.2011.04.007
日期:2011.7
The formation of uranium complexes of novel ligands belonging to phosphorylated 2-oxo-1,2-azaphospholane series, namely 2-ethoxy-1-diethoxyphosphoryl-2-oxo-1,2 lambda(5)-azaphospholane (1a) and both individual R*,R*- and R*,S*-diastereomers of the related 2-oxo-2-phenyl-1,2 lambda(5)-azaphospholanes 1b,c with different surrounding at the exocyclic phosphorus atom, has been studied. The structures of the complexes of ML composition obtained in the reaction with uranyl nitrate in 1:1 ratio were found to depend on the difference in donor properties of the oxygen atom of endo- and exocyclic phosphoryl groups. The ligand 1a possessing the greater difference, serves as O-monodentate one with metal-oxygen bonding via the endocyclic P=O function while both isomers of 1b, c coordinate to uranyl cation in a O,O-bidentate fashion. In solutions the ML complexes reacted with air oxygen to afford (mu(2)-peroxo)-bridged uranium complexes [UO2(L)NO3}(2)(mu(2)-O-2)] which structures were confirmed by X-ray crystallography data. (C) 2011 Elsevier B.V. All rights reserved.