Inorganic ozonides are formed by burning potassium or heavier alkali metals 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 consisting of an inert gas. Lithium and sodium ozonide are extremely unstable and must be prepared by low-temperature ion exchange starting from CsO3. Sodium ozonide, NaO3, which is prone to decompose into NaOH and NaO2, was previously thought to be impossible to obtain in pure form. However, with the help of cryptands and methylamine, pure NaO3 may be obtained as red crystals isostructural to NaNO2.
Organic ozonides are more explosive cousins of the organic peroxides formed by addition reactions of ozone and unsaturated compounds. They are intermediates in ozonolysis and have a trioxolane ring structure with a five-membered C-O-O-C-O ring. 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. Due to their instability, they are rarely isolated during the course of the ozonolysis reaction sequence.
- ^ F.A. Cotton and G. Wilkinson "Advanced Inorganic Chemistry", 5th edition (1988), p.462
- ^ Korber, N.; Jansen, M. (1996). "Ionic Ozonides of Lithium and Sodium: Circumventive Synthesis by Cation Exchange in Liquid Ammonia and Complexation by Cryptands". Chemische Berichte 129 (7): 773–777. doi:10.1002/cber.19961290707.
- ^ Klein, W.; Armbruster, K.; Jansen, M. (1998). "Synthesis and crystal structure determination of sodium ozonide". Chemical Communications (6): 707–708. doi:10.1039/a708570b. http://www.rsc.org/delivery/_ArticleLinking/DisplayArticleForFree.cfm?doi=a708570b&JournalCode=CC.
- ^ Criegee, R. Angew. Chem. Int. Ed. Engl. 1975, 87, 745-752. (doi:10.1002/anie.197507451)
- ^ http://www.organic-chemistry.org/namedreactions/ozonolysis-criegee-mechanism.shtm Ozonolysis mechanism on Organic Chemistry Portal site
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