The [U2F12]2- Anion of Sr[U2F12]

Benjamin Scheibe, Clemens Pietzonka, Otto Mustonen, Maarit Karppinen, Antti J. Karttunen, Mihail Atanasov, Frank Neese, Matthias Conrad, Florian Kraus*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

The D2h-symmetric dinuclear complex anion [U2F12]2- of pastel green Sr[U2F12] shows a hitherto unknown structural feature: The coordination polyhedra around the U atoms are edge-linked monocapped trigonal prisms, the UV atoms are therefore seven-coordinated. This leads to a U-U distance of 3.8913(6)Å. A weak UV-UV interaction is observed for the dinuclear [U2F12]2- complex and described by the antiferromagnetic exchange Jexp of circa -29.9cm-1. The crystalline compound can be easily prepared from SrF2 and β-UF5 in anhydrous hydrogen fluoride (aHF) at room temperature. It was studied by means of single crystal X-ray diffraction, IR, Raman and UV/VIS spectroscopy, magnetic measurements, and by molecular as well as by solid-state quantum chemical calculations.

Original languageEnglish
Pages (from-to)2914-2918
JournalAngewandte Chemie
Volume57
Issue number11
DOIs
Publication statusPublished - Jan 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Fluorine
  • Hexafluoridouranate(V)
  • Magnetic properties
  • Quantum chemical calculations
  • Uranium

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