 | |
| Names | |
|---|---|
| IUPAC name Trioxidan-1-id-3-yl | |
| Identifiers | |
3D model (JSmol) | |
| ChEBI | |
| ChemSpider | |
| 25183 | |
| |
| |
| Properties | |
| O−3 | |
| Molar mass | 47.997 g·mol−1 |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Ozonide is thepolyatomic anionO−3.Cyclic organic compounds formed by the addition ofozone (O3) to analkene are also called ozonides.
Inorganic ozonides[1] are dark red salts. The anion has thebent shape of the ozone molecule.
Inorganic ozonides are formed by burningpotassium,rubidium, orcaesium in ozone, or by treating thealkali metal hydroxide with ozone; this yieldspotassium ozonide,rubidium ozonide, andcaesium ozonide respectively. They are very sensitive explosives that have to be handled at low temperatures in aninert gas atmosphere. Lithium and sodium ozonide are extremely labile and must be prepared by low-temperature ion exchange starting fromCsO3.Sodium ozonide,NaO3, which is prone to decomposition intoNaOH andNaO2, was previously thought to be impossible to obtain in pure form.[2] However, with the help ofcryptands andmethylamine, puresodium ozonide may be obtained as red crystals isostructural toNaNO2.[3]
Ionic ozonides are being investigated[citation needed] as sources ofoxygen inchemical oxygen generators.Tetramethylammonium ozonide, which can be made by ametathesis reaction with caesium ozonide inliquid ammonia, is stable up to 348 K (75 °C):[4]
Alkaline earth metal ozonide compounds have also become known. For instance,magnesium ozonide complexes have been isolated in a low-temperatureargon matrix.[5]
Phosphite ozonides,(RO)3PO3, are used in the production ofsinglet oxygen. They are made by ozonizing aphosphite ester indichloromethane at low temperatures, and decompose to yield singlet oxygen and aphosphate ester:[6][7]
Molozonides are formed by the addition reaction between ozone andalkenes. They are rarely isolated during the course of theozonolysis reaction sequence. Molozonides are unstable and rapidly convert to thetrioxolane ring structure with a five-membered C–O–O–C–O ring.[8][9] They usually appear in the form of foul-smelling oily liquids, and rapidly decompose in the presence of water tocarbonyl compounds:aldehydes,ketones,peroxides.
