Bromosyl trifluoride
Other names
Bromine oxide trifluoride, bromosyltrifluoride
3D model (JSmol)
  • InChI=1S/BrF3O/c2-1(3,4)5
  • O=Br(F)(F)F
Molar mass 152.898 g·mol−1
Appearance colorless liquid
Related compounds
Related compounds
Chlorosyl trifluoride
Iodosyl trifluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Bromosyl trifluoride is an inorganic compound of bromine, fluorine, and oxygen with the chemical formula BrOF3.[1][2]


Synthesis of bromosyl trifluoride is by reaction of anhydrous HF with K[BrOF4] at –78 °C.[3]

HF + K[BrOF4] → BrOF3 + K[HF2]

Physical properties

Bromosyl trifluoride forms a colorless liquid at room temperature. It reacts with water.[5]

Chemical properties

Bromosyl trifluoride is quite unstable and decomposes at room temperature:

2BrOF3 → 2BrF3 + O2


  1. ^ Gillespie, Ronald J.; Spekkens, Paul H. (1 January 1977). "Bromyl fluoride and bromosyl trifluoride: preparation and chemical and spectroscopic properties". Journal of the Chemical Society, Dalton Transactions (16): 1539–1546. doi:10.1039/DT9770001539. ISSN 1364-5447. Retrieved 24 May 2023.
  2. ^ "bromine trifluoride oxide". ChemSrc. Retrieved 24 May 2023.
  3. ^ Wiberg, Egon; Wiberg, Nils (2001). Inorganic Chemistry. Academic Press. p. 468. ISBN 978-0-12-352651-9. Retrieved 24 May 2023.
  4. ^ Ellern, Arkady; Boatz, Jerry A.; Christe, Karl O.; Drews, Thomas; Seppelt, Konrad (September 2002). "The Crystal Structures of ClF3O, BrF3O, and [NO]+[BrF4O]−". Zeitschrift für Anorganische und Allgemeine Chemie (in German). 628 (9–10): 1991–1999. doi:10.1002/1521-3749(200209)628:9/10<1991::AID-ZAAC1991>3.0.CO;2-1. ISSN 0044-2313. S2CID 94064764.
  5. ^ Haynes, William M. (9 June 2015). CRC Handbook of Chemistry and Physics, 96th Edition. CRC Press. p. 4-53. ISBN 978-1-4822-6097-7. Retrieved 24 May 2023.