Disulfuryl fluoride
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| Names | |
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| Other names
Pyrosulfuryl fluoride
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| Identifiers | |
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).
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Disulfuryl fluoride is an inorganic compound of sulfur, fluorine, and oxygen with the chemical formula S2O5F2.
Synthesis
[edit | edit source]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
[edit | edit source]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
[edit | edit source]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
[edit | edit source]References
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