Fluorine fluorosulfate

Fluorine fluorosulfate

Identifiers
CAS Number	13536-85-1
3D model (JSmol)	Interactive image
ChemSpider	10329038
PubChem CID	19971358
InChI InChI=1S/F2O3S/c1-5-6(2,3)4 Key: NTZQXTIIJGXIMQ-UHFFFAOYSA-N
SMILES FS(=O)(=O)OF
Properties
Chemical formula	F2O3S
Molar mass	118.05 g·mol−1
Appearance	colorless gas
Density	1.7844 g/cm3
Melting point	−158.5 °C
Boiling point	−31.3 °C
Solubility in water	reacts with water
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Fluorine fluorosulfate is an inorganic compound of fluorine, oxygen, and sulfur with the chemical formula F₂O₃S.

Synthesis

The compound can be prepared by the reaction of sulfur trioxide and fluorine at a temperature of 200 °C: ^[1]

SO₃ + F₂ → FOSO₂F

Also, a reaction of peroxydisulfuryl difluoride with fluorine. ^[2]

Physical characteristics

The compound is a strong oxidizing agent that is also potentially explosive. ^[3]

At 200 °C the compound decomposes without explosion. ^[4]

Chemical properties

The compound reacts with bases to form the fluorosulfonate anion, the fluoride ion, water, and oxygen: ^[5]

FSO₃F + 2 H⁻ → SO₃F⁻ + F⁻ + H₂O + 1/₂O₂

It reacts with potassium iodide to form potassium fluorosulfonate, potassium fluoride, and iodine: ^[5]

FSO₃F + 2 KI → KSO₃F + KF + I₂

Fluorine fluorosulfate reacts with SSF₂, SeF₄, AsF₃, and MoF₅ and also with SF₄, Br₂, and I₂. All compounds react exothermically, and sometimes explosively, between 80–298 K. ^[6]

See also

• Bromine fluorosulfate
• Chlorine fluorosulfate
• Iodine fluorosulfate

References

1. Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3156. ISBN   978-0-412-30120-9 . Retrieved 18 August 2025.
2. Advances in Inorganic Chemistry and Radiochemistry. Academic Press. 28 June 1974. p. 194. ISBN   978-0-08-057865-1 . Retrieved 18 August 2025.
3. Mistry, F.; Willner, H.; Aubke, F. (1 September 1991). "Fluorine fluorosulfate revisited". Journal of Fluorine Chemistry. 54 (1): 59. Bibcode:1991JFluC..54...59M. doi:10.1016/S0022-1139(00)83569-1. ISSN   0022-1139 . Retrieved 18 August 2025.
4. Bretherick, L. (27 October 2016). Bretherick's Handbook of Reactive Chemical Hazards. Elsevier. p. 1112. ISBN   978-1-4831-6250-8 . Retrieved 18 August 2025.
5. Dudley, Frank B.; Cady, George H.; Eggers, David F. Jr. (1 January 1956). "Fluorine Fluorosulfonate". Journal of the American Chemical Society . 78 (2): 290–292. Bibcode:1956JAChS..78..290D. doi:10.1021/ja01583a011. ISSN   0002-7863 . Retrieved 18 August 2025.
6. Willner, H.; Mistry, F.; Aubke, F. (1 December 1992). "Selected reactions of fluorine-fluorosulfate, FOSO2F". Journal of Fluorine Chemistry. 59 (3): 333–349. doi:10.1016/S0022-1139(00)80329-2. ISSN   0022-1139 . Retrieved 18 August 2025.