Caesium ozonide

Caesium ozonide
	; Caesium ozonide contaminated with caesium superoxide
Names
	IUPAC name Caesium ozonide
Identifiers
CAS Number	12053-67-7;
3D model (JSmol)	Interactive image;
	InChI InChI=1S/Cs.HO3/c;1-3-2/h;1H/q+1;/p-1 Key: SLQRFWQASSLHIF-UHFFFAOYSA-M;
	SMILES [Cs+].[O-]O[O];
Properties
Chemical formula	CsO3
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	Caesium fluoride ; Caesium chloride ; Caesium bromide ; Caesium iodide
Other cations	Sodium ozonide ; Potassium ozonide ; Rubidium ozonide
Related caesium oxides	Caesium suboxide; Caesium monoxide; Caesium peroxide; Caesium sesquioxide; Caesium superoxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Caesium ozonide (CsO₃) is an oxygen-rich compound of caesium. It is an ozonide, meaning it contains the ozonide anion (O₃⁻). It can be formed by reacting ozone with caesium superoxide:[2][3]

{\ce {CsO2 + O3 -> CsO3 + O2}}

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

{\ce {2 CsO3 + H2O -> 2CsOH + 5/2O2}}

If heated to between 70 and 100 °C, caesium ozonide will quickly decompose to caesium superoxide (CsO₂).[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 in place of the chloride ion. At lower temperatures, the crystal structure changes to a structure identical to rubidium ozonide (RbO₃), with space group P2₁/c.[2]

References

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.
Jansen, M.; Hesse, W. (1988). "Darstellung, Kristallstruktur und Eigenschaften von Cäsiumozonid". Zeitschrift für anorganische und allgemeine Chemie (in German). Wiley. 560 (1): 47–54. doi:10.1002/zaac.19885600106. ISSN 0044-2313.
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.
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.

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[Skol1966-1] 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.

[Jansen-2] Jansen, M.; Hesse, W. (1988). "Darstellung, Kristallstruktur und Eigenschaften von Cäsiumozonid". Zeitschrift für anorganische und allgemeine Chemie (in German). Wiley. 560 (1): 47–54. doi:10.1002/zaac.19885600106. ISSN 0044-2313.

[Volnov-3] 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.