Iodine trichloride

Iodine trichloride
IUPAC name

iodine trichloride
Identifiers
CAS number 865-44-1
PubChem 70076
ChemSpider 63265 Y
Jmol-3D images Image 1
Properties
Molecular formula I2Cl6
Molar mass 466.5281 g/mol
Appearance yellow solid
Density 3.11 g/cm3
Melting point

63 °C
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Iodine trichloride is an interhalogen compound of iodine and chlorine. It is bright yellow and in the solid state is present as a planar dimer I2Cl6, Cl2I(μ-Cl)2ICl2, with two bridging Cl atoms.[1]

It can be prepared by reacting iodine with an excess of liquid chlorine at −70 °C. In the melt it is conductive, which may indicate dissociation:[2]

I2Cl6 ICl2+ + ICl4−

Iodine trichloride can be created by heating a mixture of liquid iodine and chlorine gas to 105 °C.

It is an oxidizing agent, capable of causing fire on contact with organic materials.

References

  1. ^ K. H. Boswijk and E. H. Wiebenga (1954). "The crystal structure of I2Cl6 (ICl3)". Acta Crystallographica 7 (5): 417–423. doi:10.1107/S0365110X54001260. 
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0080379419.