Disulfuryl fluoride
Chemical compound
From Wikipedia, the free encyclopedia
Disulfuryl fluoride is an inorganic compound of sulfur, fluorine, and oxygen with the chemical formula S2O5F2. This is the anhydride of fluorosulfuric acid.
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| Names | |
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| Other names
Pyrosulfuryl fluoride | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.032.624 |
| EC Number |
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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).
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Synthesis
Autoclave heating of sulfur trioxide and calcium fluoride:
- 3SO3 + 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
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