Trifluoroiodomethane

Trifluoroiodomethane
Names
Preferred IUPAC name
Trifluoro(iodo)methane
Other names
Trifluoroiodomethane
Iodotrifluoromethane
Monoiodotrifluoromethane
Trifluoromethyl iodide
Perfluoromethyl iodide
Freon 13T1
Identifiers
2314-97-8 YesY
3D model (Jmol) Interactive image
ChemSpider 15962 YesY
ECHA InfoCard 100.017.286
EC Number 219-014-5
PubChem 16843
RTECS number PB6975000
UNII 42A379KB0U YesY
Properties
CF3I
Molar mass 195.91 g/mol
Appearance Colorless odorless gas
Density 2.5485 g/cm3 at -78.5 °C
2.3608 g/cm3 at -32.5 °C
Melting point −110 °C (−166 °F; 163 K)
Boiling point −22.5 °C (−8.5 °F; 250.7 K)
Slightly
Vapor pressure 541 kPa
Hazards
Safety data sheet See: data page
Muta. Cat. 3
R-phrases R68
S-phrases (S2), S36/37
Supplementary data page
Refractive index (n),
Dielectric constant (εr), etc.
Thermodynamic
data
 Phase behaviour
solid–liquid–gas
UV, IR, NMR, MS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY verify (what is YesYN ?)
Infobox references

Trifluoroiodomethane, also referred to as trifluoromethyl iodide is a halomethane with the formula CF3I. It is an experimental alternative to Halon 1301 (CBrF3) in unoccupied areas.[1] It would be used as a gaseous fire suppression flooding agent for in-flight aircraft and electronic equipment fires.

Chemistry

It is used in the rhodium-catalyzed α-trifluoromethylation of α,β-unsaturated ketones.[2]

In the presence of sunlight or at temperatures above 100 °C it can react with water, forming hazardous by-products such as hydrogen fluoride (HF), hydrogen iodide (HI) and carbonyl fluoride (COF2).

Environmental effects

Trifluoroiodomethane contains carbon, fluorine, and iodine atoms. Although iodine is several hundred times more efficient at destroying stratospheric ozone than chlorine, experiments have shown that because the weak C-I bond breaks easily under the influence of water (owing to the electron-attracting fluorine atoms), trifluoroiodomethane has an ozone depleting potential less than one-thousandth that of Halon 1301 (0.008-0.01). Its atmospheric lifetime, at less than 1 month, is less than 1 percent that of Halon 1301, and less even than hydrogen chloride formed from volcanoes.

There is, however, still the problem of the C-F bonds absorbing in the atmospheric window.[3] However, the IPCC has calculated the 100-year global warming potential of trifluoroiodomethane to be 0.4 (i.e., 40% of that of CO2).[4]

Further reading

References

  1. ↑ http://www.afrlhorizons.com/Briefs/0012/ML0008.html
  2. ↑ 171441 Trifluoroiodomethane 99%
  3. ↑ http://webbook.nist.gov/cgi/cbook.cgi?ID=C2314978&Units=SI&Mask=800#Electronic-Spec
  4. ↑ http://www.fmv.se/Global/Dokument/Engelska%20webben/Our%20activities/Enviromental%20work/Environmental%20criteria%20documents/121023/12FMV1533%202%201%20GWP%20eng.pdf
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