Matches in SemOpenAlex for { <https://semopenalex.org/work/W4237121036> ?p ?o ?g. }
Showing items 1 to 62 of
62
with 100 items per page.
- W4237121036 abstract "Ketones are emitted directly to the atmosphere, and their sources were discussed in detail in chapter I. In the U.K. acetone and butanone comprise about 7% and 5%, respectively, of the total anthropogenic emissions of oxygenated compounds, and 1.6% and 1.1%, respectively, of the total anthropogenic emissions of nonmethane volatile organic compounds. Ketone emissions from solvents (both industrial and personal) are substantial; emissions from both gasoline- and diesel-fueled vehicles also contribute. Ketones are also formed extensively in the atmosphere in the oxidation of other compounds. Acetone, for example is formed in the OH-initiated oxidation of propane, iso-butane, iso-pentane, and neopentane and from a number of higher hydrocarbons. It is also formed in the oxidation of terpenes. The distribution, sources, and sinks of acetone in the atmosphere have been analyzed by Simpson et al. (1994). Methyl vinyl ketone is an important first generation product in the OH-initiated oxidation of isoprene. In this chapter, we discuss the rate coefficients and the mechanisms of oxidation of ketones. The classes covered include alkanones, hydroxyketones, diketones, unsaturated ketones, ketenes, cyclic ketones, ketones derived from biogenic compounds, and halogen-substituted ketones. Photolysis is a major atmospheric process for many ketones, and will be discussed in chapter IX. The major bimolecular reactions removing ketones from the atmosphere are with OH. Although less important than the OH reactions, reactions with Cl have been studied quite extensively. Other than for unsaturated ketones, reactions with NO3 and O3 are unimportant in tropospheric chemistry and have been studied little. The carbonyl group deactivates the α-position with respect to reaction with OH, but activates the β-position, and possibly more distant sites as well. The net result is that the overall rate coefficient of an alkanone generally exceeds that of the equivalent alkane. The temperature dependences of the rate coefficients can be quite complex, with acetone and possibly butanone showing a minimum in the rate coefficient at ∼250 K, while the higher alkanones show negative temperature dependences across the more limited temperature ranges that have been investigated. The most likely explanation of this behavior is the formation of a pre-reaction, hydrogen-bonded complex." @default.
- W4237121036 created "2022-05-12" @default.
- W4237121036 creator A5024382257 @default.
- W4237121036 creator A5029894864 @default.
- W4237121036 creator A5033746678 @default.
- W4237121036 creator A5084160293 @default.
- W4237121036 creator A5084451270 @default.
- W4237121036 date "2011-09-29" @default.
- W4237121036 modified "2023-09-27" @default.
- W4237121036 title "Rate Coefficients and Mechanisms for the Atmospheric Oxidation of the Ketones" @default.
- W4237121036 doi "https://doi.org/10.1093/oso/9780199767076.003.0008" @default.
- W4237121036 hasPublicationYear "2011" @default.
- W4237121036 type Work @default.
- W4237121036 citedByCount "0" @default.
- W4237121036 crossrefType "book-chapter" @default.
- W4237121036 hasAuthorship W4237121036A5024382257 @default.
- W4237121036 hasAuthorship W4237121036A5029894864 @default.
- W4237121036 hasAuthorship W4237121036A5033746678 @default.
- W4237121036 hasAuthorship W4237121036A5084160293 @default.
- W4237121036 hasAuthorship W4237121036A5084451270 @default.
- W4237121036 hasConcept C121332964 @default.
- W4237121036 hasConcept C153294291 @default.
- W4237121036 hasConcept C15920480 @default.
- W4237121036 hasConcept C161790260 @default.
- W4237121036 hasConcept C178790620 @default.
- W4237121036 hasConcept C185592680 @default.
- W4237121036 hasConcept C2777738585 @default.
- W4237121036 hasConcept C2778717364 @default.
- W4237121036 hasConcept C2780959689 @default.
- W4237121036 hasConcept C2781213060 @default.
- W4237121036 hasConcept C521977710 @default.
- W4237121036 hasConcept C65440619 @default.
- W4237121036 hasConcept C75473681 @default.
- W4237121036 hasConceptScore W4237121036C121332964 @default.
- W4237121036 hasConceptScore W4237121036C153294291 @default.
- W4237121036 hasConceptScore W4237121036C15920480 @default.
- W4237121036 hasConceptScore W4237121036C161790260 @default.
- W4237121036 hasConceptScore W4237121036C178790620 @default.
- W4237121036 hasConceptScore W4237121036C185592680 @default.
- W4237121036 hasConceptScore W4237121036C2777738585 @default.
- W4237121036 hasConceptScore W4237121036C2778717364 @default.
- W4237121036 hasConceptScore W4237121036C2780959689 @default.
- W4237121036 hasConceptScore W4237121036C2781213060 @default.
- W4237121036 hasConceptScore W4237121036C521977710 @default.
- W4237121036 hasConceptScore W4237121036C65440619 @default.
- W4237121036 hasConceptScore W4237121036C75473681 @default.
- W4237121036 hasLocation W42371210361 @default.
- W4237121036 hasOpenAccess W4237121036 @default.
- W4237121036 hasPrimaryLocation W42371210361 @default.
- W4237121036 hasRelatedWork W14101755 @default.
- W4237121036 hasRelatedWork W1689334 @default.
- W4237121036 hasRelatedWork W33495739 @default.
- W4237121036 hasRelatedWork W40725735 @default.
- W4237121036 hasRelatedWork W4257329 @default.
- W4237121036 hasRelatedWork W43027969 @default.
- W4237121036 hasRelatedWork W4484828 @default.
- W4237121036 hasRelatedWork W46455093 @default.
- W4237121036 hasRelatedWork W637798 @default.
- W4237121036 hasRelatedWork W7934479 @default.
- W4237121036 isParatext "false" @default.
- W4237121036 isRetracted "false" @default.
- W4237121036 workType "book-chapter" @default.