Chemistry:Caesium ozonide

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Caesium ozonide
Crystal structure of Caesium ozonide
  Caesium cations, Cs+
  Ozonide anions, O
3
Caesium ozonide.png
Caesium ozonide contaminated with caesium superoxide
Names
IUPAC name
Caesium ozonide
Identifiers
3D model (JSmol)
Properties
CsO3
Molar mass 180.902 g·mol−1
Appearance Dark cherry red powder[1]
Density 3.19 g/cm3[1]
Melting point 85 °C (185 °F; 358 K) (decomposes)
Related compounds
Other anions
Other cations
Related caesium oxides
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
Tracking categories (test):

Caesium ozonide is an oxygen-rich chemical compound of caesium, with the chemical formula CsO
3
. It consists of caesium cations Cs+
and ozonide anions O
3
. It can be formed by reacting ozone with caesium superoxide:[2][3]

CsO
2
+ O
3
→ CsO
3
+ O
2

The compound reacts strongly with any water in the air forming caesium hydroxide.[3]

4 CsO
3
+ 2 H
2
O → 4 CsOH + 5 O
2

If heated to between 70 and 100 °C, caesium ozonide will quickly decompose to caesium superoxide (CsO
2
).[3] In fact, the compound is metastable to decomposition into caesium superoxide, slowly decomposing at room temperature, but can remain intact for months if stored at −20 °C.[4]

Above around 8 °C, the crystal structure is of the caesium chloride type, with the ozonide ion in place of the chloride ion. At lower temperatures, the crystal structure changes to a structure identical to rubidium ozonide (RbO
3
), with space group P21/c.[2]

References

  1. 1.0 1.1 Sokol, V. I.; Matvee, V. V.; Vol'nov, I. I. (1966). "Determination of the density and refractive index of cesium ozonide". Bulletin of the Academy of Sciences, USSR Division of Chemical Science (Springer Science and Business Media LLC) 15 (12): 2169–2171. doi:10.1007/bf00867730. ISSN 0568-5230. 
  2. 2.0 2.1 Jansen, M.; Hesse, W. (1988). "Darstellung, Kristallstruktur und Eigenschaften von Cäsiumozonid" (in de). Zeitschrift für anorganische und allgemeine Chemie (Wiley) 560 (1): 47–54. doi:10.1002/zaac.19885600106. ISSN 0044-2313. 
  3. 3.0 3.1 3.2 Vol'nov, I. I.; Matveev, V. V. (1963). "Synthesis of cesium ozonide through cesium superoxide". Bulletin of the Academy of Sciences, USSR Division of Chemical Science (Springer Science and Business Media LLC) 12 (6): 1040–1043. doi:10.1007/bf00845494. ISSN 0568-5230. 
  4. HESSE, W; JANSEN, M; SCHNICK, W (1989). "Recent results in solid state chemistry of ionic ozonides, hyperoxides, and peroxides". Progress in Solid State Chemistry (Elsevier BV) 19 (1): 47–110. doi:10.1016/0079-6786(89)90006-x. ISSN 0079-6786. http://nbn-resolving.de/urn:nbn:de:bvb:19-epub-4017-6.