Caesium superoxide

Caesium superoxide
  Caesium cations, Cs+
  Superoxide anions, O−2
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
Density 3.77 g/cm3
Melting point 600 °C
reacts
Thermochemistry
−295 kJ/mol
Related compounds
Other anions
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Caesium superoxide is a chemical compound with the chemical formula CsO2. It consists of caesium cations Cs+ and superoxide anions O−2. It is an orange solid.

Structure

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

Preparation

Burning caesium in excess oxygen will produce caesium superoxide.

Cs + O2 → CsO2

Reactions

Caesium superoxide reacts with water to form hydrogen peroxide and caesium hydroxide.

2 CsO2 + 2 H2O → O2↑ + H2O2 + 2 CsOH

Heating to approximately 400 °C induces thermal decomposition to caesium peroxide.[contradictory]

It reacts with ozone to form caesium ozonide.

CsO2 + O3 → CsO3 + O2

References

  1. 1 2 Caesiumhyperoxid bei webelements.com.
  2. 1 2 3 4 5 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.
  4. ↑ Berardinelli, S. P.; Kraus, D. L. (1974-01-01). "Thermal decomposition of the higher oxides of cesium in the temperature range 320-500.deg". Inorganic Chemistry. 13 (1). American Chemical Society (ACS): 189–191. doi:10.1021/ic50131a037. ISSN 0020-1669.