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.

Preparation

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

Cs + O2 → CsO2

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]

2 CsO2 + 2 H2O → O2↑ + H2O2 + 2 CsOH

Heating to approximately 400 °C induces thermal decomposition to caesium peroxide.[3]

The standard enthalpy of formation ΔHf0 of caesium superoxide is −295 kJ/mol.[4]

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

CsO2 + O3 → CsO3 + O2

References

  1. ^ a b Caesiumhyperoxid bei webelements.com.
  2. ^ a b c d e Holleman, Arnold (2007). Lehrbuch der anorganischen Chemie (in German). BerlinNew York: de Gruyter. ISBN 978-3-11-017770-1. OCLC 180963521.
  3. ^ 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.
  4. ^ Holleman, Arnold (2017). Anorganische ChemienBand 1 (in German). Berlin: de Gruyter. ISBN 978-3-11-049585-0. OCLC 968134975.
Allikas: Https://en.wikipedia.org/wiki/Cesium_superoxide
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