Thionyl bromide
Chemical compound / From Wikipedia, the free encyclopedia
Thionyl bromide is the chemical compound SOBr2. It is less stable and less widely used than its chloride analogue, thionyl chloride. It is prepared by the action of hydrogen bromide on thionyl chloride,[2] a characteristic reaction where a stronger acid is converted to a weaker acid:[citation needed]
- SOCl2 + 2 HBr → SOBr2 + 2 HCl
Quick Facts Names, Identifiers ...
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Names | |||
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IUPAC name
Thionyl bromide | |||
Other names
Sulfur oxy dibromide | |||
Identifiers | |||
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.007.332 | ||
EC Number |
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PubChem CID |
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UNII | |||
CompTox Dashboard (EPA) |
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Properties | |||
SOBr2 | |||
Molar mass | 207.87 g/mol | ||
Appearance | colorless liquid | ||
Density | 2.688 g/mL, liquid | ||
Melting point | −52 °C (−62 °F; 221 K) | ||
Boiling point | 68 °C (154 °F; 341 K) at 40 mmHg | ||
decomposes | |||
Solubility | reacts in HBr, acetone, and alcohol soluble in benzene, toluene, ether | ||
Structure | |||
trigonal pyramidal | |||
Hazards[1] | |||
Occupational safety and health (OHS/OSH): | |||
Main hazards |
Readily decomposes in air to toxic gases | ||
GHS labelling: | |||
Danger | |||
H312, H314, H332 | |||
P280, P305+P351+P338, P310 | |||
Flash point | Non-flammable | ||
Safety data sheet (SDS) | "External MSDS" | ||
Related compounds | |||
Related compounds |
SOCl2, SeOCl2; | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Thionyl bromide will convert alcohols to alkyl bromides and can be used for brominations of certain α,β-unsaturated carbonyl compounds.[3] It may occasionally be used as a solvent.[4][5]