Chlorine fluorosulfate

Chlorine fluorosulfate

Identifiers
CAS Number	13997-90-5
3D model (JSmol)	Interactive image
ChemSpider	10329053
PubChem CID	12521007
InChI InChI=1S/ClFO3S/c1-5-6(2,3)4 Key: WDQSSBOCSOSRIZ-UHFFFAOYSA-N
SMILES ClOS(=O)(=O)F
Properties
Chemical formula	ClFO3S
Molar mass	134.51 g·mol−1
Appearance	Light yellow liquid
Density	1.71 g/cm³
Melting point	−84.3 °C
Boiling point	43.4 °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

Chlorine fluorosulfate is an inorganic compound with the chemical formula ClFO₃S. ^[1] This is a derivative of fluorosulfonic acid.

Synthesis

Chlorine fluorosulfonate can be prepared by reacting sulfur trioxide and chlorine monofluoride at low temperatures: ^[2]

SO₃ + ClF → ClOSO₂F

The compound can also be prepared by reacting sulfonyl fluoride peroxide with chlorine at 125 °C under high pressure:

Cl₂ + S₂O₆F₂ → 2ClOSO₂F

Physical properties

The compound is a highly reactive, and forms a pale yellow liquid that reacts violently with water. ^[3] The compound decomposes upon warming to room temperature, turning red.

Chemical properties

Chlorine trifluoride oxide reacts with chlorine fluorosulfate:

ClOF₃ + 2ClOSO₂F → S₂O₅F₂ + FClO₂ + 2ClF

The reaction also produces SO₂F₂. ^[4]

The compound also reacts with nitronium perchlorate to produce chlorine perchlorate: ^[5]

2ClOSO₂F + NO₂ClO₄ → ClClO₄ + NO₂SO₃F

Uses

The compound is used as a chlorinating agent, fluorosulfating agent, and oxidizer. ^[6]

See also

• Bromine fluorosulfate
• Fluorine fluorosulfate
• Iodine fluorosulfate
• Triiodine fluorosulfate

References

1. Aubke, Friedhelm; Casper, Bernd; Müller, Holger S. P.; Oberhammer, Heinz; Willner, Helge (15 February 1995). "Vibrational spectra and gas phase structures of fluorine fluorosulfate (FOSO2F) and chlorine fluorosulfate (ClOSO2F)" . Journal of Molecular Structure . 346: 111–120. doi:10.1016/0022-2860(94)08421-D. ISSN   0022-2860 . Retrieved 9 August 2025.
2. Hardin, C. V.; Ratcliffe, Charles T.; Anderson, Lowell Ray; Fox, William B. (1 August 1970). "Preparing chlorine fluorosulfate" . Inorganic Chemistry . 9 (8): 1938–1939. doi:10.1021/ic50090a035. ISSN   0020-1669 . Retrieved 9 August 2025.
3. Inorganic Syntheses. John Wiley & Sons. 22 September 2009. p. 8. ISBN   978-0-470-13290-6 . Retrieved 9 August 2025.
4. Advances in Inorganic Chemistry and Radiochemistry. Academic Press. 9 July 1976. pp. 331–333. ISBN   978-0-08-057867-5 . Retrieved 9 August 2025.
5. Steudel, Ralf (20 April 2011). Chemistry of the Non-Metals: With an Introduction to Atomic Structure and Chemical Bonding. Walter de Gruyter. p. 266. ISBN   978-3-11-083082-8 . Retrieved 9 August 2025.
6. Schack, Carl J.; Wilson, Richard D.; Totsch, W. (1986). "Chlorine Fluorosulfate". Inorganic Syntheses. John Wiley & Sons, Ltd. pp. 6–8. doi:10.1002/9780470132555.ch3. ISBN   978-0-470-13255-5 . Retrieved 9 August 2025.