Chlorine perchlorate

Chlorine perchlorate
IUPAC name

Chlorine perchlorate
Systematic name

Chloro perchlorate[1]
Other names

Chlorine (I,VII) oxide
Dichlorine tetroxide
Identifiers
CAS number 27218-16-2 Y
PubChem 168667
ChemSpider 147540 N
Jmol-3D images Image 1
Properties
Molecular formula Cl2O4
Molar mass 134.9 g mol−1
Exact mass 133.917363902 g mol-1
Appearance Pale, green liquid
Density 1.81 g cm-3
Melting point

-117 °C, 156 K, -179 °F
Solubility in water Reacts
Hazards
Main hazards oxidizer
 N (verify) (what is: Y/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Chlorine perchlorate is the chemical compound with the formula Cl2O4. This chlorine oxide is an asymmetric oxide, with one chlorine atom in oxidation state +1 and the other +7, with proper formula ClOClO3. It is produced by the photolysis of chlorine dioxide at room temperature with 436 nm ultraviolet light:[2][3]

2 ClO2 → ClOClO3

Chlorine perchlorate can also be made the following reactions at −45 °C.

CsClO4 + ClOSO2F → Cs(SO3)F + ClOClO3

Chlorine perchlorate is a pale greenish liquid which decomposes at room temperature.

Properties

It is less stable than ClO2 and decomposes to O2, Cl2 and Cl2O6 at room temperature.

2 ClOClO3 → O2 + Cl2 + Cl2O6

Chlorine perchlorate reacts with metal chlorides forming anhydrous perchlorates:

CrO2Cl2 + 2 ClOClO3 → 2 Cl2 + CrO2(ClO4)2
TiCl4 + 4 ClOClO3 → 4 Cl2 + Ti(ClO4)4

References

  1. ^ "Chloro Perchlorate - PubChem Public Chemical Database". The PubChem Project. USA: National Center for Biotechnology Information. http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=168667. 
  2. ^ A. J. Schell-Sorokin, D. S. Bethune, J. R. Lankard, M. M. T. Loy, P. P. Sorokin (1982). "Chlorine perchlorate a major photolysis product of chlorine dioxide". J. Phys. Chem. 86 (24): 4653–4655. doi:10.1021/j100221a001. 
  3. ^ M. I. Lopez, J. E. Sicre (1988). "Ultraviolet spectrum of chlorine perchlorate". J. Phys. Chem. 92 (2): 563–564. doi:10.1021/j100313a062.