[UF6]2−: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments

Kasper S. Pedersen; Katie R. Meihaus; Andrei Rogalev; Fabrice Wilhelm; Daniel Aravena; Martín Amoza; Eliseo Ruiz; Jeffrey R. Long; Jesper Bendix; Rodolphe Clérac

doi:10.1002/anie.201905056

[UF6]²⁻: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments

Kasper S. Pedersen, Katie R. Meihaus, Andrei Rogalev, Fabrice Wilhelm, Daniel Aravena, Martín Amoza, Eliseo Ruiz, Jeffrey R. Long, Jesper Bendix, Rodolphe Clérac

3 Citations (Scopus)

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 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.

Original language	English
Journal	Angewandte Chemie International Edition
Volume	58
Pages (from-to)	1-6
Number of pages	6
ISSN	1433-7851
DOIs	https://doi.org/10.1002/anie.201905056
Publication status	Published - 28 Oct 2019

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title = "[UF6]2−: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments",

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.",

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doi = "10.1002/anie.201905056",

language = "English",

volume = "58",

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T1 - [UF6]2−: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments

AU - Pedersen, Kasper S.

AU - Meihaus, Katie R.

AU - Rogalev, Andrei

AU - Wilhelm, Fabrice

AU - Aravena, Daniel

AU - Amoza, Martín

AU - Ruiz, Eliseo

AU - Long, Jeffrey R.

AU - Bendix, Jesper

AU - Clérac, Rodolphe

PY - 2019/10/28

Y1 - 2019/10/28

N2 - 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.

AB - 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.

U2 - 10.1002/anie.201905056

DO - 10.1002/anie.201905056

M3 - Journal article

C2 - 31290580

SN - 1433-7851

VL - 58

SP - 1

EP - 6

JO - Angewandte Chemie International Edition

JF - Angewandte Chemie International Edition

ER -

[UF6]2−: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments

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[UF6]²⁻: A Molecular Hexafluorido Actinide(IV) Complex with Compensating Spin and Orbital Magnetic Moments