Tribromofluoromethane
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| Template:Longitem | CBr3F |
| Molar mass | 270.72Script error: No such module "String".g/mol |
| Appearance | Clear yellow liquid |
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Tribromofluoromethane[1] also known as Halon 1103 or R 11B3, is a fully halogenated mixed halomethane or, more exactly, a bromofluorocarbon (BFC). It is a colorless to yellow liquid[2]
Tribromofluoromethane can be used in fire extinguishers.
Table of physical properties
| Property | Value |
|---|---|
| Refractive index, n, at 20Script error: No such module "String".°C | 1.5216 |
| Surface tension at 20Script error: No such module "String".°C | 31.68Script error: No such module "String".mN·m−1 |
| Viscosity at 0Script error: No such module "String".°C | 2.09Script error: No such module "String".mPa·s, 2.09Script error: No such module "String".cP |
History
Tribromofluoromethane was first synthesised in 1919 by Hans Rathburg.[3] It was later prepared by reacting carbon tetrabromide with antimony trifluoride and elemental bromine[4] by heating at Script error: No such module "convert". for 1 hour and having the tribromofluormethane distill off.[5]
Chemistry
Pyrolysis of tribromofluoromethane yields hexafluorobenzene at up to a 45 percent yield,[6] plus bromine, alongside small quantities of bromopentafluorobenzene.[7]
The bromines in tribromofluoromethane can be substituted by reactive metals like lithium and zinc using organometallic compounds, ultimately creating fluorinated alcohols by addition of carbonyl compounds.[8]
Tribromofluoromethane also forms phosphorus ylides which can be used to synthesise bromofluoro-substituted terminal alkenes.[9] Similar loss of bromine takes place through cyclisation with hydrazones to form 4-fluoro pyrazoles.[10]
References
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External links
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