Iodine oxide

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Iodine pentoxide (I2O5)

Iodine oxides are chemical compounds of oxygen and iodine. There exist multiple oxides as iodine has more than one oxidation state.

Iodine oxides[1]
Molecular formula IO IO2 I2O4 I2O5 I4O9
Name iodine monoxide iodine dioxide diiodine tetroxide diiodine pentoxide tetraiodine nonoxide
Structure IO IO2 [IO]+[IO3]– O(IO2)2 I(OIO2)3
CAS registry 14696-98-1 13494-92-3 12029-98-0
Appearance purple gas yellow solid yellow solid white crystalline solid dark yellow solid
Oxidation state +2[citation needed] +4[citation needed] +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

HI He
LiI BeI2 BI3 CI4 NI3 I2O4, I2O5, I4O9 IF, IF3, IF5, IF7 Ne
NaI MgI2 AlI3 SiI4 PI3, P2I4 S ICl, ICl3 Ar
KI CaI2 Sc TiI4 VI3 Cr MnI2 Fe CoI2 NiI2 CuI ZnI2 Ga2I6 GeI2, GeI4 AsI3 Se IBr Kr
RbI SrI2 Y ZrI4 Nb Mo Tc Ru Rh Pd AgI CdI2 InI3 SnI4, SnI2 SbI3 TeI4 I Xe
CsI BaI2   Hf Ta W Re Os Ir Pt AuI Hg2I2, HgI2 TlI PbI2 BiI3 Po AtI Rn
Fr Ra   Rf Db Sg Bh Hs Mt Ds Rg Cn Uut Fl Uup Lv Uus Uuo
↓
La Ce Pr Nd Pm SmI2 Eu Gd TbI3 Dy Ho Er Tm YbI2 Lu
Ac ThI4 Pa UI3, UI4 Np Pu Am Cm Bk Cf Es Fm Md No Lr

References

  1. ↑ Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5. 
  2. ↑ 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
Iodine compounds
Iodine(-I)
Iodine(I)
Iodine(III)
Iodine(V)
Iodine(VII)
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