Thionyl fluoride
Chemical compound / From Wikipedia, the free encyclopedia
Thionyl fluoride is the inorganic compound with the formula SOF
2. This colourless gas is mainly of theoretical interest, but it is a product of the degradation of sulfur hexafluoride, an insulator in electrical equipment. The molecule adopts a distorted pyramidal structure, with Cs symmetry. The S-O and S-F distances are 1.42 and 1.58 Å, respectively. The O-S-F and F-S-F angles are 106.2 and 92.2°, respectively. Thionyl chloride and thionyl bromide have similar structures, although these compounds are liquid at room temperature. Mixed halides are also known, such as SOClF, thionyl chloride fluoride.[3]
Quick Facts Names, Identifiers ...
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Names | |||
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IUPAC name
Thionyl fluoride | |||
Identifiers | |||
3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.029.088 ![]() | ||
EC Number |
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PubChem CID |
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UNII | |||
CompTox Dashboard (EPA) |
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Properties | |||
F2OS | |||
Molar mass | 86.06 g·mol−1 | ||
Appearance | colorless gas | ||
Melting point | −110.5 °C (−166.9 °F; 162.7 K) | ||
Boiling point | −43.8 °C (−46.8 °F; 229.3 K) | ||
hydrolysis | |||
Solubility | soluble in ethanol, ether, benzene | ||
Vapor pressure | 75.7 kPa (-50 °C)[1] | ||
Structure | |||
trigonal pyramidal | |||
Thermochemistry | |||
Std molar entropy (S⦵298) |
278.6 J/mol·K[2] | ||
Std enthalpy of formation (ΔfH⦵298) |
-715 kJ/mol[2] | ||
Std enthalpy of combustion (ΔcH⦵298) |
56.8 J/mol·K[2] | ||
Hazards | |||
GHS labelling: | |||
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Danger | |||
H300, H310, H314, H330 | |||
P260, P262, P264, P270, P271, P280, P284, P301+P310, P301+P330+P331, P302+P350, P303+P361+P353, P304+P340, P305+P351+P338, P310, P320, P321, P322, P330, P361, P363, P403+P233, P405, P501 | |||
Related compounds | |||
Related oxohalides |
Thionyl chloride Thionyl bromide | ||
Related compounds |
Nitrosyl fluoride Carbonyl fluoride | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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