Exchange of an Imido Ligand in Bis(imido) Complexes of Uranium

摘要

The study of the uranyl ion,UO_2~(2+),has been central to understanding metal-ligand bonding in the f elements and in determining the extent to which the f electrons participate in such interactions.Our recent isolation of the imido analogues of uranyl,namely,U(NR)_2~(2+),provides another model that can be used to refine our understanding of these phenomena.We now report the synthesis of a uranium oxo imido complex,trans-[U(NR)(O)]~(2+),which provides a link between the uranyl and bis(imido) extremes.