colorless liquid; enthalpy of vaporization 24.7kJ/mol; specific conductivity 10?9ohm· cm [KIR78] [MER06]
Iodine heptafluoride is used as a fluorinatingagent.
Iodine heptafluoride may be prepared by the reaction of fluorine withpotassium iodide:
5I2 + 4HCl + 3Cl2 → 10ICl + 2H2
Dried KI should be used to minimize the formation of IOF5.
Also, IF7 can be prepared by passing fluorine gas through liquid iodinepentafluoride at high temperature (90°C) and then heating the vapors to 270°C to complete the reaction:
2I2 + HIO3 + 2HCl → 2ICl + 3HIO
Iodine heptafluoride is highly irritating to theskin and mucous membranes. Toxicity dataon this compound are not available.
Nonflammable gas. It reacts violently with
ammonium halides (chloride, bromide, or
iodide) and with organic matter (Mellor
1946, Suppl. 1956). It burns with carbon
monoxide.
