Caesium superoxide

Caesium superoxide is the superoxide of caesium. It is an orange solid.

Caesium superoxide
Identifiers
3D model (JSmol)
  • InChI=1S/Cs.HO2/c;1-2/h;1H/q+1;/p-1
    Key: DZWLBLJPRRQKGB-UHFFFAOYSA-M
  • [Cs+].[O-][O]
Properties
CsO2
Molar mass 164.903 g·mol−1
Appearance yellow to orange solid [1]
Density 3.77 g·cm−3[1]
Melting point 600 °C[2]
reacts
Related compounds
Other anions
 caesium oxide
caesium peroxide
Other cations
 lithium superoxide
sodium superoxide
potassium superoxide
rubidium superoxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Preparation

Burn caesium in excess oxygen will produce caesium superoxide.[2]

Properties

Caesium superoxide's crystal structure is same as calcium carbide. It contains direct oxygen-oxygen bonding.[2]

It reacts with water to form hydrogen peroxide and caesium hydroxide.[2]

The standard enthalpy of formation ΔHf0 of caesium superoxide is −295 kJ/mol.[3]

Caesium superoxide reacts with ozone to form caesium ozonide.[2]

References
  1. Caesiumhyperoxid bei webelements.com.
  2. Holleman, Arnold (2007). Lehrbuch der anorganischen Chemie (in German). BerlinNew York: de Gruyter. ISBN 978-3-11-017770-1. OCLC 180963521.
  3. Holleman, Arnold (2017). Anorganische ChemienBand 1 (in German). Berlin: de Gruyter. ISBN 978-3-11-049585-0. OCLC 968134975.


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