The Interhalogen Cations [Br2F5]+ and [Br3F8]+

Research output: Contribution to journalArticle


  • Sergei I. Ivlev
  • Antti Karttunen

  • Magnus R. Buchner
  • Matthias Conrad
  • Florian Kraus

Research units

  • University of Marburg


The synthesis and characterization of unique polyhalogen cations containing μ-bridging fluorine atoms are reported. The [Br2F5]+ cation features a symmetric [F2Br-μ-F-BrF2] bridge, whereas the [Br3F8]+ contains asymmetric μ-F bridges. These fluoronium ions, obtained as [SbF6]- salts, were investigated using Raman and 19FNMR spectroscopy, as well as single-crystal X-ray diffraction. Quantum chemical calculations were carried out for the gas-phase cations as well as for the solid-state compounds. Population analyses show the μ-F atoms to possess the most negative partial charge within the cations.


Original languageEnglish
Pages (from-to)14640–14644
JournalAngewandte Chemie - International Edition
Publication statusPublished - 26 Oct 2018
MoE publication typeA1 Journal article-refereed

    Research areas

  • Antimony pentafluoride, Bromine trifluoride, Fluoronium ions, Heteropolyhalogen cations, Structure elucidation

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