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Caesium superoxide

Chemical compound From Wikipedia, the free encyclopedia

Caesium superoxide
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Caesium superoxide is a chemical compound with the chemical formula CsO2. It consists of caesium cations Cs+ and superoxide anions O2. It is an orange solid.

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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
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References

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