Iodine trifluoride dioxide

Iodine trifluoride dioxide is an inorganic compound of iodine, fluorine, and oxygen with the chemical formula IO2F3. The compound was first obtained by Engelbrecht and Petersy in 1969.

Synthesis
Iodine trifluoride dioxide may be formed by the reaction of HOIOF4 and oleum.

Physical properties
Iodine trifluoride dioxide forms yellow crystals, which melt at 41 °C. Decomposes under direct sunlight or heating.

The molecules in the crystals are dimers. The compound is monomeric above 100 °C.

Chemical properties
Iodine trifluoride dioxide decomposes when heated:


 * 2IO2F3 -> 2IOF3 + O2