Crystal structure of tetra(glycolato)uranium(IV) dihydrate a photoreduction product of uranyl ions in the presence of glycolic acid

Abstract

The crystal structure of the title compound has been determined as the first example of a monomeric carboxylatocomplex of U^IV. The crystals are monoclinic, P2₁/a, with a= 6.555(6), b= 17.652(13), c= 8.008(2), β= 128.52(4), and Z= 2. The structure has been solved by the heavy-atom method and refined to R= 0.057 for 1 031 observed reflections. The uranium atoms are ten-co-ordinate, with bicapped square-antiprismatic geometry [U–O 2.38(2)–2.55(1)Å], and the glycolate anions are planar, 1 : 4 co-ordinated.