1. [UF6](2-): A molecular hexafluorido actinide(IV) complex with compensating spin and orbital magnetic moments
- Author
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Andrei Rogalev, Daniel Aravena, Katie R. Meihaus, Rodolphe Clérac, Fabrice Wilhelm, Eliseo Ruiz, Kasper S. Pedersen, Jesper Bendix, Martín Amoza, Jeffrey R. Long, Department of Chemistry, Technical University of Denmark, Lyngby, Department of Chemistry, University of California Berkeley, European Synchrotron Radiation Facility (ESRF), Universidad de Santiago de Chile [Santiago] (USACH), Departament de Quimica Inortganica i Organica and Institut de Quimica Teorica i Computacional, Department of Chemistry [Berkeley], University of California [Berkeley], University of California-University of California, Department of Chemistry [Copenhagen], Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (KU)-University of Copenhagen = Københavns Universitet (KU), Centre de Recherche Paul Pascal (CRPP), and Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Electronic structure ,Urani ,Metalls de terres rares ,010402 general chemistry ,01 natural sciences ,Molecular physics ,Catalysis ,Ion ,Magnetization ,Fluorides ,Ab initio quantum chemistry methods ,Spectroscopy ,Spin (physics) ,Physics ,Magnetic moment ,actinides ,010405 organic chemistry ,Magnetic circular dichroism ,Rare earth metals ,General Chemistry ,General Medicine ,[CHIM.MATE]Chemical Sciences/Material chemistry ,Espectroscòpia de raigs X ,0104 chemical sciences ,Imants ,Magnets ,X-ray spectroscopy ,Uranium ,magnetic properties - Abstract
The first structurally characterized hexafluorido complex of a tetravalent actinide ion, the [UF6]2− anion, is reported in the (NEt4)2[UF6]⋅2 H2O salt (1). The weak magnetic response of 1 results from both UIV spin and orbital contributions, as established by combining X‐ray magnetic circular dichroism (XMCD) spectroscopy and bulk magnetization measurements. The spin and orbital moments are virtually identical in magnitude, but opposite in sign, resulting in an almost perfect cancellation, which is corroborated by ab initio calculations. This work constitutes the first experimental demonstration of a seemingly non‐magnetic molecular actinide complex carrying sizable spin and orbital magnetic moments.
- Published
- 2019
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