Title: Strongly coupled binuclear uranium–oxo complexes from uranyl oxo rearrangement and reductive silylation
Authors: ARNOLD Polly L.JONES Guy MODOH Samuel OSCHRECKENBACH GeorgMAGNANI NicolaLOVE Jason B.
Citation: NATURE CHEMISTRY vol. 4 p. 221-227
Publisher: NATURE PUBLISHING GROUP
Publication Year: 2012
JRC N°: JRC69437
ISSN: 1755-4330
URI: http://www.nature.com/nchem/journal/v4/n3/full/nchem.1270.html
http://publications.jrc.ec.europa.eu/repository/handle/JRC69437
DOI: 10.1038/NCHEM.1270
Type: Articles in Journals
Abstract: The most common motif in uranium chemistry is the d0f0 uranyl ion [UO2]21 in which the oxo groups are rigorously linear and inert. Alternative geometries, such as the cis-uranyl, have been identified theoretically and implicated in oxo-atom transfer reactions that are relevant to environmental speciation and nuclear waste remediation. Single electron reduction is now known to impart greater oxo-group reactivity, but with retention of the linear OUO motif, and reactions of the oxo groups to form new covalent bonds remain rare. Here, we describe the synthesis, structure, reactivity and magnetic properties of a binuclear uranium–oxo complex. Formed through a combination of reduction and oxo-silylation and migration from a trans to a cis position, the new butterfly-shaped Si–OUO2UO–Si molecule shows remarkably strong UV–UV coupling and chemical inertness, suggesting that this rearranged uranium oxo motif might exist for other actinide species in the environment, and have relevance to the aggregation of actinide oxide clusters.
JRC Institute:Institute for Transuranium Elements

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.