The 1:3 uranium(VI)-8-hydroxyquinoline compound: its composition and thermal conversion into bis(8-hydroxyquinolinato)dioxouranium(VI).
Evidence is provided to show that in the red compound formed between uranium(VI) and 8-hydroxyquinoline, the ligand-to-uranium ratio is slightly lower than 3:1, at least when the compound is prepared by a widely accepted procedure. Competition between 8-hydroxyquinoline and other ligands such as water or ammonia is probably responsible for the non-stoichiometry. Further, it is shown that a procedure frequently used for the thermal conversion of the red compound into bis(8-hydroxyquinolmato)dioxouranium(VI) yields a compound in which the ligand-to-uranium ratio is less than 2:1. Conditions which lead to the thermal preparation of the stoichiometric bis compound are described.
Corsini
A
A
Department of Chemistry McMaster University Hamilton, Ontario, Canada.
Abraham
J
J