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'''Ozonide''' is an unstable, reactive [[polyatomic ion|polyatomic]] [[anion]] O<sub>3</sub><sup>&minus;</sup>, derived from [[ozone]], or an organic compound similar to [[organic peroxide]] formed by a reaction of ozone with an [[unsaturated compound]].

==Inorganic ozonides==
'''Inorganic ozonides''' are dark red [[ionic compound]]s containing the reactive O<sub>3</sub><sup>&minus;</sup> [[anion]]. The anion has the V shape of the ozone molecule.

Inorganic ozonides are formed by burning [[potassium]] or heavier [[alkali metal]]s in [[ozone]], or by treating the alkali metal hydroxide with ozone; if potassium is left undisturbed in air for years it accumulates a covering of superoxide and ozonide. They are very sensitive explosives that have to be handled at low temperatures in an atmosphere comprised of an [[inert gas]]. Lithium and sodium ozonide are extremely unstable and must be prepared by low-temperature ion exchange starting from CsO<sub>3</sub>, and the pure solids cannot be isolated.

Inorganic ozonides are being investigated as promising sources of [[oxygen]] in [[chemical oxygen generator]]s.

==Organic ozonides==
'''Organic ozonides''' are more explosive cousins of the [[organic peroxide]]s and contain a [[covalent bond|covalently bonded]] ozonide group, -O-O-O-. They usually appear in the form of foul-smelling oily liquids. Their main use is in determining the structure of chemical compounds. As [[reactive intermediate|intermediates]] of [[ozonolysis]], they are formed by an addition reaction of ozone and [[unsaturated compound]]s, and rapidly decompose to [[carbonyl]] compounds - [[aldehyde]]s, [[ketone]]s, [[peroxide]]s.

==See also==
* [[ozonolysis]]
* [[ozone]]

* [[superoxide]], O<sub>2</sub><sup>&minus;</sup>
* [[peroxide]], O<sub>2</sub><sup>2&minus;</sup>
* [[oxide]], O<sup>2&minus;</sup>
* dioxygenyl, O<sub>2</sub><sup>+</sup>

[[Category:Anions]]
[[Category:Oxygen compounds]]
[[Category:Endocrinology]]
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