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Title: [UF6](2-): A molecular hexafluorido actinide(IV) complex with compensating spin and orbital magnetic moments
Author: Pedersen, Kasper S.
Meihaus, Katie R.
Rogalev, Andrei
Wilhelm, Fabrice
Aravena Ponce, Daniel Alejandro
Amoza Dávila, Martín
Ruiz Sabín, Eliseo
Long, Jeffrey R.
Bendix, Jesper
Clérac, Rodolphe
Keywords: Metalls de terres rares
Espectroscòpia de raigs X
Rare earth metals
X-ray spectroscopy
Issue Date: 7-Aug-2019
Publisher: Wiley-VCH
Abstract: The first structurally characterized hexafluorido complex of a tetravalent actinide ion, the [UF6]2- anion, is reported in the (NEt4)2[UF6]2H2O salt (1). The weak magnetic response of 1 results from both U(IV) 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.
Note: Versió postprint del document publicat a:
It is part of: Angewandte Chemie-International Edition, 2019, vol. 58, num. 44, p. 15650-15654
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ISSN: 1433-7851
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)

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