Dichlorine hexoxide

Dichlorine hexoxide
Space-filling model of the dichlorine hexoxide molecule
Space-filling model of the component ions of dichlorine hexoxide
Names
IUPAC name
Dichlorine hexoxide
Other names
Chlorine trioxide; Chloryl perchlorate; Chlorine(V,VII) oxide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/Cl2O6/c3-1(4)8-2(5,6)7
    Key: BMVIIZAOKBSWDS-UHFFFAOYSA-N
  • O=[Cl](=O)O[Cl](=O)(=O)=O
  • O=[Cl+]=O.[O-]Cl(=O)(=O)=O
Properties
Cl2O6
Molar mass 166.901 g/mol
Appearance red liquid
Density 1.65 g/cm3
Melting point 3.5 °C (38.3 °F; 276.6 K)
Boiling point 200 °C (392 °F; 473 K)
Reacts
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 oxidizer
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Dichlorine hexoxide is the chemical compound with the molecular formula Cl
2O
6, which is correct for its gaseous state. However, in liquid or solid form, this chlorine oxide ionizes into the dark red ionic compound chloryl perchlorate [ClO
2]+
[ClO
4]−
, which may be thought of as the mixed anhydride of chloric and perchloric acids. This compound is a notable perchlorating agent.[1]

It is produced by reaction between chlorine dioxide and excess ozone:

2 ClO
2 + 2 O
3 → 2 ClO
3 + 2 O
2 → Cl
2O
6 + 2 O
2
  1. ^ Jean-Louis Pascal; Frédéric Favier (1998). "Inorganic perchlorato complexes". Coordination Chemistry Reviews. 178–180 (1): 865–902. doi:10.1016/S0010-8545(98)00102-7.