Trifluoroiodomethane

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Trifluoroiodomethane
Trifluoroiodomethane.png Trifluoroiodomethane-3D-vdW.png
Identifiers
CAS number 2314-97-8 YesY
PubChem 16843
ChemSpider 15962 YesY
UNII 42A379KB0U YesY
EC number 219-014-5
RTECS number PB6975000
Jmol-3D images Image 1
Properties
Molecular formula 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)
Solubility in water Slightly
Vapor pressure 541 kPa
Hazards
MSDS External MSDS
EU Index 602-086-00-0
EU classification Muta. Cat. 3
R-phrases R68
S-phrases (S2), S36/37
Supplementary data page
Structure and
properties
n, εr, etc.
Thermodynamic
data
Phase behaviour
Solid, liquid, gas
Spectral data UV, IR, NMR, MS
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY (verify) (what is: YesY/N?)
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[edit]

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[edit]

It 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] Thus, even after decomposition, trifluoroiodomethane is likely to be a very effective greenhouse gas.[3]

Further reading[edit]

References[edit]

  1. ^ http://www.afrlhorizons.com/Briefs/0012/ML0008.html
  2. ^ 171441 Trifluoroiodomethane 99%
  3. ^ a b http://webbook.nist.gov/cgi/cbook.cgi?ID=C2314978&Units=SI&Mask=800#Electronic-Spec

External links[edit]