Caesium superoxide
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. PreparationBurning caesium in excess oxygen will produce caesium superoxide.[2]
PropertiesCaesium 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]
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]
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