Iodine oxide

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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[edit]

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 CrI3 MnI2 FeI2 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 Yb Lu
Ac ThI4 Pa UI3,
UI4
Np Pu Am Cm Bk Cf Es Fm Md No Lr

References[edit]

  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