Iodyl fluoride

Iodyl fluoride is an inorganic compound of iodine, fluorine, and oxygen with the chemical formula IO2F. The compound was initially synthesized in 1951.

Synthesis

 * Iodyl fluoride can be decomposed by iodosyl trifluoride heated to 110 °C in nitrogen. Since this reaction is reversible, the reaction requires constant removal of iodine pentafluoride.


 * 2IOF3 ⇌ IO2F + IF5


 * Dissolving the anhydride of iodic acid, I2O5, in anhydrous hydrofluoric acid.
 * I2O5 + HF -> IO2F + HIO3

Physical properties
Iodyl fluoride forms colorless crystals of orthorhombic system. Reacts with water.

Chemical properties
Iodyl fluoride is stable in dry air, but slowly hydrolyzes to iodic and hydrofluoric acids in moisture.


 * IO2F + H2O -> HIO3 + HF

The compound reacts with strong fluorinating agents such as bromine trifluoride and selenium tetrafluoride to form iodine pentafluoride. Iodyl fluoride can be reduced to elemental iodine by pure hydrogen peroxide.


 * 3IO2F + 4BrF3 -> 3IF5 + 2Br2 + 3O2
 * IO2F + 2SeF4 -> IF5 + 2SeOF2