Iodine trichloride

Iodine trichloride
Names
IUPAC name
iodine trichloride
Identifiers
865-44-1 Yes
ChemSpider 63265 Yes
Jmol-3D images Image
PubChem 70076
Properties
I2Cl6
Molar mass 466.5281 g/mol
Appearance yellow solid
Density 3.11 g/cm3
Melting point 63 °C (145 °F; 336 K)
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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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 is in equilibrium with 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; 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.). Butterworth-Heinemann. ISBN 0080379419.