Caesium superoxide
(Redirected fromCesium superoxide)
 Caesium cations,Cs+ Superoxide anions,O−2 | |
| Identifiers | |
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3D model (JSmol)
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| Properties | |
| CsO2 | |
| Molar mass | 164.903g·mol−1 |
| Appearance | Yellow to orange solid[1] |
| Density | 3.77 g/cm3[1] |
| Melting point | 600 °C[2] |
| reacts | |
| Related compounds | |
Otheranions
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Othercations
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Except where otherwise noted, data are given for materials in theirstandard state(at 25 °C [77 °F], 100 kPa).
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Caesium superoxideis achemical compoundwith thechemical formulaCsO2.It consists ofcaesiumcationsCs+andsuperoxideanionsO−2.It is an orange solid.
Preparation
[edit]Burning caesium in excessoxygenwill produce caesium superoxide.[2]
- Cs + O2→ CsO2
Properties
[edit]Caesium superoxide'scrystal structureis same ascalcium carbide.It contains direct oxygen-oxygen bonding.[2]
It reacts with water to formhydrogen peroxideandcaesium hydroxide.[2]
- 2 CsO2+ 2 H2O → O2↑ + H2O2+ 2 CsOH
Heating to approximately 400 °C induces thermal decomposition tocaesium peroxide.[3]
Thestandard enthalpy of formationΔHf0of caesium superoxide is −295 kJ/mol.[4]
Caesium superoxide reacts withozoneto formcaesium ozonide.[2]
- CsO2+ O3→ CsO3+ O2
References
[edit]- ^abCaesiumhyperoxid bei webelements.com.
- ^abcdeHolleman, Arnold (2007).Lehrbuch der anorganischen Chemie(in German). BerlinNew York: de Gruyter.ISBN978-3-11-017770-1.OCLC180963521.
- ^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.ISSN0020-1669.
- ^Holleman, Arnold (2017).Anorganische ChemienBand 1(in German). Berlin: de Gruyter.ISBN978-3-11-049585-0.OCLC968134975.