Iodine trichloride

Iodine trichloride

Names
IUPAC name iodine trichloride
Identifiers
CAS Number	865-44-1
ChemSpider	63265
Jmol interactive 3D	Image
PubChem	70076
InChI InChI=1S/Cl3I/c1-4(2)3 Key: PAWIVBWALDNUJP-UHFFFAOYSA-N InChI=1/Cl3I/c1-4(2)3 Key: PAWIVBWALDNUJP-UHFFFAOYAF
SMILES ClI(Cl)Cl
Properties
Chemical formula	I2Cl6
Molar mass	466.5281 g/mol
Appearance	yellow solid
Density	3.11 g/cm^3
Melting point	63 °C (145 °F; 336 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
verify (what is  ?)
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; 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 0-08-037941-9.