Iodine trichloride

Iodine trichloride

Full structural formula of the dimer
Space-filling model of the dimer
Commercial sample of iodine trichloride
Names
IUPAC name iodine trichloride
Identifiers
CAS Number	865-44-1 Y
ChemSpider	63265 Y
Jmol 3D model	Interactive image
PubChem	70076
InChI InChI=1S/Cl3I/c1-4(2)3 Y Key: PAWIVBWALDNUJP-UHFFFAOYSA-N Y 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/cm3
Melting point	63 °C (145 °F; 336 K)
Vapor pressure	{{{value}}}
Except where otherwise noted, data are 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.

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:

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.