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

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.

Keywords

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

DOI

10.1002/anie.201800743

Citation

Scheibe, B, Pietzonka, C, Mustonen, O, Karppinen, M, Karttunen, A J, Atanasov, M, Neese, F, Conrad, M & Kraus, F 2018, ' The [U 2 F 12 ] 2- Anion of Sr[U 2 F 12 ] ', Angewandte Chemie, vol. 57, no. 11, pp. 2914-2918 . https://doi.org/10.1002/anie.201800743

Permanent link to this item

https://urn.fi/URN:NBN:fi:aalto-201811095631

Collections

[article-cris] Kemian tekniikan korkeakoulu / CHEM

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