Iodine trifluoride dioxide

Iodine trifluoride dioxide is an inorganic compound of iodine, fluorine, and oxygen with the chemical formula IO₂F₃.^[1][2][3] The compound was first obtained by Engelbrecht and Petersy in 1969.^[4]

Iodine trifluoride dioxide

Names
Other names Iodyl trifluoride
Identifiers
CAS Number	25402-50-0 Y
3D model (JSmol)	Interactive image
InChI InChI=1S/F3IO2/c1-4(2,3,5)6 Key: IEYUHHXVKPWNHY-UHFFFAOYSA-N
SMILES F[I](=O)(=O)(F)F
Properties
Chemical formula	IO2F3
Molar mass	215.898 g·mol−1
Appearance	yellow crystals
Melting point	41 °C (106 °F; 314 K)
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	ignites on contact with flammable organic substances
Related compounds
Related compounds	Iodosyl trifluoride Iodosyl pentafluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

Iodine trifluoride dioxide may be formed by the reaction of HO−IOF₄ and oleum.^[4]

Physical properties

Iodine trifluoride dioxide forms yellow volatile crystals, which melt at 41 °C.^[5] Decomposes under direct sunlight or heating.

The molecules in the crystals are dimers. The compound is monomeric above 100 °C.^[6]

Chemical properties

Iodine trifluoride dioxide decomposes when heated:

2 IO₂F₃ → 2 IOF₃ + O₂