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Criegee intermediates may be collisionally stabilized via collisions with other molecules in the atmosphere. These stabilized
Criegee intermediates may then undergo thermal unimolecular decay to OH radicals and other products, or may undergo bimolecular reactions with other atmospheric species.
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When
Criegee intermediates are formed, some portion of them will undergo prompt unimolecular decay, producing OH radicals and other products. However, they may instead become stabilized by interactions with other molecules or react with other chemicals to give different products.
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The alkene ozonolysis reaction is extremely exothermic, releasing about 50 kilocalories per mole (210 kJ/mol) of excess energy. Therefore, the
Criegee intermediates are formed with a large amount of internal energy.
173:
Welz, Oliver; Savee, John D.; Osborn, David L.; Vasu, Subith S.; Percival, Carl J.; Shallcross, Dudley E.; Taatjes, Craig A. (13 January 2012). "Direct
Kinetic Measurements of Criegee Intermediate (CH
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Taatjes, Craig A.; Shallcross, Dudley E.; Percival, Carl J.; Vasu, Subith S.; Osborn, David L.; Savee, John D.; Welz, Oliver (2012-01-13). "Direct
Kinetic Measurements of Criegee Intermediate (CH
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Criegee intermediates are formed by the gas-phase reactions of alkenes and ozone in the Earth's atmosphere. Ozone adds across the carbon–carbon double bond of the alkene to form a
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Marston, George; Johnson, David (2008-03-25). "The gas-phase ozonolysis of unsaturated volatile organic compounds in the troposphere".
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79:). OH radicals are the most important oxidant in the troposphere, and are important in controlling air quality and pollution.
124:, which then decomposes to produce a carbonyl (RR'CO) and a carbonyl oxide. The latter is known as the Criegee intermediate.
75:, which are an important factor in controlling global climate. Criegee intermediates are also an important source of OH (
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In the ozonolysis reaction sequence, the
Criegee intermediate reacts with another carbonyl compound (generally the
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Ozone reacts with an alkene to form a carbonyl and a carbonyl oxide, known as a
Criegee intermediate.
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Chemistry of the upper and lower atmosphere : theory, experiments, and applications
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445:(12 April 2013). "Infrared Absorption Spectrum of the Simplest Criegee Intermediate CH
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342:"Offsetting Global Warming: Molecule in Earth's Atmosphere Could 'Cool the Planet'"
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The formation of this sort of structure was first postulated in the 1950s by
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byproduct of the
Criegee-intermediate formation reaction itself) to form an
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in the Earth's atmosphere, and are implicated in the formation of
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has a substantially zwitterionic character rather than the
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Heard, Dwayne E.; Whalley, Lisa K.; Stone, Daniel (2012).
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with two charge centers. These chemicals may react with
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Finlayson-Pitts, Barbara J.; Pitts, James N. (2000).
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radicals: field measurements and model comparisons"
238:"How mysterious molecules may help cool Earth"
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236:Castro, Joseph (January 12, 2012).
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312:. San Diego: Academic Press.
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370:OO) Formed by Reaction of CH
177:OO) Formed by Reaction of C
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568:Climate change mitigation
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273:Chemical Society Reviews
16:Not to be confused with
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265:"Tropospheric OH and HO
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22:Criegee rearrangement
156:(1,2,4-trioxolane).
92:electronic structure
40:Criegee intermediate
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392:2012Sci...335..204W
199:2012Sci...335..204W
348:. January 12, 2012
286:10.1039/C2CS35140D
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457:(6129): 174–176.
386:(6065): 204–207.
279:(19): 6348–6404.
193:(6065): 204–207.
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18:Criegee oxidation
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547:Categories
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249:2012-01-12
160:References
122:molozonide
108:Ozonolysis
46:zwitterion
33:zwitterion
525:1460-4744
408:1095-9203
328:162128929
102:Formation
96:biradical
53:biradical
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424:26810853
416:22246773
374:I with O
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243:NBC News
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215:22246773
181:I with O
146:aldehyde
73:aerosols
58:carbonyl
51:Criegee
44:Criegee
31:Criegee
459:Bibcode
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132:Removal
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