Chemistry:Disulfuryl fluoride
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| Other names
Pyrosulfuryl fluoride
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3D model (JSmol)
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| F2O5S2 | |
| Molar mass | 182.11 g·mol−1 |
| Appearance | colorless 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). | |
| Infobox references | |
Disulfuryl fluoride is an inorganic compound of sulfur, fluorine, and oxygen with the chemical formula S
2O
5F
2. This is the anhydride of fluorosulfuric acid.
Synthesis
Autoclave heating of sulfur trioxide and calcium fluoride:
- 3SO
3 + CaF
2 → S
2O
5F
2 + CaSO
4
- 3SO
The compound can be produced by the reaction of SSF
2 and FOSO
2F in deuterated chloroform at −100 °C:[1]
- 2SSF
2 + 4FOSO
2F → 2S
2O
5F
2 + 2SOF
2 + SF
4 + 1⁄
8S
8
- 2SSF
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:
- S
2O
5F
2 + H
2O → 2HSO
3F
- S
It reacts with tetraethyl titanate to produce diethoxytitanium difluorosulfonate:[6]
- Ti(OC
2H
5)
4 + 2S
2O
5F
2 → Ti(OC
2H
5)
2(O
3SF)
2 + 2C
2H
5OSO
2F
- Ti(OC
See also
- Sulfuryl fluoride
- Disulfuryl chloride
- Disulfuryl chloride fluoride
- Trisulfuryl fluoride
- Peroxydisulfuryl difluoride
References
- ↑ 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. https://www.sciencedirect.com/science/article/abs/pii/S0022113900803292. Retrieved 15 August 2025.
- ↑ Cernik, M. (1987). "ChemInform Abstract: Reaction of Iodine Pentafluoride with Sulfur Trioxide." (in en). ChemInform 18 (33). doi:10.1002/chin.198733027. ISSN 1522-2667. https://onlinelibrary.wiley.com/doi/10.1002/chin.198733027. Retrieved 15 August 2025.
- ↑ (in en) Inorganic Syntheses, Volume 11. John Wiley & Sons. 22 September 2009. p. 151. ISBN 978-0-470-13277-7. https://www.google.ru/books/edition/Inorganic_Syntheses_Volume_11/lnsax7gfyfYC?hl=en&gbpv=1&dq=pyrosulfuryl+fluoride&pg=PA151&printsec=frontcover. Retrieved 16 August 2025.
- ↑ Simons, J. H. (2 December 2012) (in en). Fluorine Chemistry V5. Elsevier. p. 70. ISBN 978-0-323-14724-8. https://www.google.ru/books/edition/Fluorine_Chemistry_V5/9AbqU4cI93wC?hl=en&gbpv=1&dq=pyrosulfuryl+fluoride&pg=PA70&printsec=frontcover. Retrieved 16 August 2025.
- ↑ Ryss, Iosif Grigorʹevich (1960) (in en). The Chemistry of Fluorine and Its Inorganic Compounds. U. S. Atomic Energy Commission, Technical Information Service Extension. p. 185. https://www.google.ru/books/edition/The_Chemistry_of_Fluorine_and_Its_Inorga/ltsiAQAAMAAJ?hl=en&gbpv=1&dq=pyrosulfuryl+fluoride&pg=PA185&printsec=frontcover. Retrieved 16 August 2025.
- ↑ 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. doi:10.1016/0022-1139(93)03012-B. ISSN 0022-1139. Bibcode: 1994JFluC..66..153N. https://www.sciencedirect.com/science/article/abs/pii/002211399303012B. Retrieved 15 August 2025.
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