Disulfuryl fluoride

Last updated
Disulfuryl fluoride
Disulfuryl fluoride.svg
Names
Other names
Pyrosulfuryl fluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.032.624 OOjs UI icon edit-ltr-progressive.svg
EC Number
  • 235-903-0
PubChem CID
  • InChI=1S/F2O5S2/c1-8(3,4)7-9(2,5)6 Yes check.svgY
    Key: WICQXESQFGXSKV-UHFFFAOYSA-N Yes check.svgY
  • O=S(=O)(OS(=O)(=O)F)F
Properties
F2O5S2
Molar mass 182.11 g·mol−1
Appearancecolorless liquid
Density 1.75 g/cm3
Melting point –48 °C
Boiling point 50.8 °C
reacts with water
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Disulfuryl fluoride is an inorganic compound of sulfur, fluorine, and oxygen with the chemical formula S2O5F2.

Contents

Synthesis

Autoclave heating of sulfur trioxide and calcium fluoride:

2SO3 + CaF2 → S2O5F2 + CaSO4

The compound can be produced by the reaction of SSF2 and FOSO2F in deuterated chloroform at −100 °C: [1]

2SSF2 + 4FOSO2F → 2S2O5F2 + 2SOF2 + SF4 + 1⁄8S8

It can also be produced in the reaction of iodine pentafluoride and sulfur trioxide. [2]

Other methods are also known. [3]

Physical properties

Pyrosulfuryl difluoride forms a colorless liquid that smokes slightly in the air. It causes severe suffocation and resembles phosgene in its action. [4] [5]

Chemical properties

When heated, the compound is stable to a temperature of 200 °C.

It is slowly hydrolyzed by water:

S2O5F2 + H2O → 2HSO3F

It reacts with tetraethyl titanate to produce diethoxytitanium difluorosulfonate: [6]

Ti(OC2H5)4 + 2S2O5F2 → Ti(OC2H5)2(O3SF)2 + 2C2H5OSO2F

See also

References

  1. 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 15 August 2025.
  2. Cernik, M. (1987). "ChemInform Abstract: Reaction of Iodine Pentafluoride with Sulfur Trioxide" . ChemInform . 18 (33) chin.198733027. doi:10.1002/chin.198733027. ISSN   1522-2667 . Retrieved 15 August 2025.
  3. Inorganic Syntheses, Volume 11. John Wiley & Sons. 22 September 2009. p. 151. ISBN   978-0-470-13277-7 . Retrieved 16 August 2025.
  4. Simons, J. H. (2 December 2012). Fluorine Chemistry V5. Elsevier. p. 70. ISBN   978-0-323-14724-8 . Retrieved 16 August 2025.
  5. Ryss, Iosif Grigorʹevich (1960). The Chemistry of Fluorine and Its Inorganic Compounds. U. S. Atomic Energy Commission, Technical Information Service Extension. p. 185. Retrieved 16 August 2025.
  6. Niyogi, Debyani G.; Singh, Sukhjinder; Saini, Anju; Verma, R. D. (1 February 1994). "Reactions of fluorinated acid anhydrides with metal alkoxides" . Journal of Fluorine Chemistry. 66 (2): 153–158. Bibcode:1994JFluC..66..153N. doi:10.1016/0022-1139(93)03012-B. ISSN   0022-1139 . Retrieved 15 August 2025.