Ozonide
Template:Short description Template:Chembox
Ozonide is the polyatomic anion Template:Chem2. Cyclic organic compounds formed by the addition of ozone (Template:Chem2) to an alkene are also called ozonides.
Ionic ozonides
Inorganic ozonides[1] are dark red salts. The anion has the bent shape of the ozone molecule.
Inorganic ozonides are formed by burning potassium, rubidium, or caesium in ozone, or by treating the alkali metal hydroxide with ozone; this yields potassium ozonide, rubidium ozonide, and caesium ozonide respectively. They are very sensitive explosives that have to be handled at low temperatures in an inert gas atmosphere. Lithium and sodium ozonide are extremely labile and must be prepared by low-temperature ion exchange starting from Template:Chem2. Sodium ozonide, Template:Chem2, which is prone to decomposition into NaOH and [[sodium superoxide|Template:Chem2]], was previously thought to be impossible to obtain in pure form.[2] However, with the help of cryptands and methylamine, pure sodium ozonide may be obtained as red crystals isostructural to [[sodium nitrite|Template:Chem2]].[3]
Ionic ozonides are being investigatedScript error: No such module "Unsubst". as sources of oxygen in chemical oxygen generators. Tetramethylammonium ozonide, which can be made by a metathesis reaction with caesium ozonide in liquid ammonia, is stable up to Template:Cvt:[4]
Alkaline earth metal ozonide compounds have also become known. For instance, magnesium ozonide complexes have been isolated in a low-temperature argon matrix.[5]
Covalent singly bonded structures
Phosphite ozonides, Template:Chem2, are used in the production of singlet oxygen. They are made by ozonizing a phosphite ester in dichloromethane at low temperatures, and decompose to yield singlet oxygen and a phosphate ester:[6][7]
Molozonides
Molozonides are formed by the addition reaction between ozone and alkenes. They are rarely isolated during the course of the ozonolysis reaction sequence. Molozonides are unstable and rapidly convert to the trioxolane 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 to carbonyl compounds: aldehydes, ketones, peroxides.
File:Simplified ozonolysis mechanism.PNG Formation of an organic ozonide. The second arrow represents several steps as shown in ozonolysis.
See also
- Ozonolysis
- Ozone cracking
- Superoxide, Template:Chem/link
- Oxide, Template:Chem/link
- Dioxygenyl, Template:Chem/link
References
<templatestyles src="Reflist/styles.css" />
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Wang, Guanjun & Gong, Yu & Zhang, Qingqing & Zhou, Mingfei. "Formation and Characterization of Magnesium Bisozonide and Carbonyl Complexes in Solid Argon". The journal of physical chemistry. A. 114 (2010). 10803-9. https://www.researchgate.net/publication/46392397_Formation_and_Characterization_of_Magnesium_Bisozonide_and_Carbonyl_Complexes_in_Solid_Argon
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Ozonolysis mechanism on Organic Chemistry Portal site
Script error: No such module "Check for unknown parameters".
External links
- Matrix reactions of alkali metal atoms with ozone: Infrared spectra of the alkali metal ozonide moleculesScript error: No such module "Unsubst".