PbF[Br2F7], a Fluoridobromate(III) of a p-Block Metal

Jascha Bandemehr, Malte Sachs, Sergei I. Ivlev, Antti J. Karttunen, Florian Kraus*

*Corresponding author for this work

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The compound PbF[Br2F7] represents the first fluoridobromate(III) of a p-block element. It was synthesized in form of needle-shaped crystals among its colorless powder from the direct reaction of PbF2 with BrF3. Powder X-ray diffraction, IR and Raman spectroscopy show that it was obtained in almost pure form with Pb3F8 and Pb2F6 as by-products. The single crystal structure was determined by X-ray diffraction. PbF[Br2F7] crystallizes in space group P21/c (No. 14) with a = 4.3698(3), b = 13.3767(7), c = 12.0836(8) Å, β = 97.509(5)°, V = 700.27(8) Å3, Z = 4 at T = 100 K. PbF[Br2F7] decomposes above 50 °C due to loss of BrF3 and pure PbF2 remains. Quantum chemical calculations were performed on the crystal structure of the compound to assign the bands of the vibrational spectra and to obtain electron density difference maps that visualize the electron density around the Pb atoms. CHARDI calculations support the assignment of the oxidation states +II, +III, and –I to the Pb, Br, and F atoms, respectively.

Original languageEnglish
Pages (from-to)64-70
JournalEuropean Journal of Inorganic Chemistry
Volume2020
Issue number1
DOIs
Publication statusAccepted/In press - 1 Jan 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Bromine trifluoride
  • Fluorides
  • Lead
  • Quantum chemical calculations
  • Structure elucidation

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