Iodine oxide
Iodine oxides are chemical compounds of oxygen and iodine. There exist multiple oxides as iodine has more than one oxidation state.
| Iodine oxides [1] | ||||
| IO | I2O4 | I2O5 | I4O9 | |
| Synonyms | iodine monoxide | diiodine tetraoxide | diiodine pentaoxide | tetraiodine nonaoxide |
| Structure | IO | [IO]+[IO3]– | O(IO2)2 | I(OIO2)3 |
| CAS registry | 12029-98-0 | |||
| Appearance | purple gas | yellow solid | white crystalline solid | dark yellow solid |
| Oxidation state | +2 | +3 and +5 | +5 | +3 and +5 |
| Melting point | decomp. 100 °C | decomp. 300–350 °C | decomp. 75 °C | |
| Specific gravity | 4.2 | 4.8 | ||
| Solubility in water | decomp. to HIO3 + I2 | 187 g/100 ml | decomp. to HIO3 + I2 | |
The iodine oxide free radical (IO) is a known ozone depletion agent.[2] Atmospheric compounds containing iodine form iodine radicals which react with ozone to form iodine oxide radicals (IO) and oxygen. The IO radicals in turn participate in other ozone-consuming reactions. It is a purple gas.
See also
- Iodine pentoxide
- Oxygen fluoride
- Chlorine oxide
- Bromine oxide
- Other compounds of iodine with elements in the periodic table:
References
- ^ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
- ^ Halogens Hover In Antarctic Iodine oxide and bromine oxide deplete atmospheric ozone Rachel Petkewich Chemical & Engineering News July 23, 2007 Volume 85, Number 30 p. 9 http://pubs.acs.org/cen/news/85/i30/8530notw4.html