Mass spectrometric detection of dioxirane, H2COO, and its decomposition products, H2 and CO, from the reaction of ozone with ethylene

Organic material in the global troposphere

“…The recent paper by Atkinson et al [1982] suggests that the reaction rates of a-and/3-pinene with ozone are lower than previously reported, which would increase the relative importance of the reaction with OH for these two hydrocar-bons. Reaction mechanisms have been investigated in great detail for alkenes [Demerjian et al, 1974;Wadt and Goddard, 1975;Martinez et al, 1977;Herron and Huie, 1977;Niki et al, 1978;Atkinson et al, 1979;Falls and $einfeld, 1978] and to some extent for cyclic olefins [Grosjean, 1977;Grosjean and Friedlander, 1979] and for terpenes [Schwartz, 1974]. The status and limitations of our current knowledge of these reactions have been reviewed by Niki [1978].…”

“…Major products from isoprene photooxidation are formaldehyde and the two unsaturated carbonyls methacrolein and methylvinylketone Arnts and Gay, 1979] The ozone-olefin reaction mechanism is also quite complex and is summarized in Figure 11. It involves ozone addition on the double bond, to form the initial molozonide, and the subsequent formation of a dioxy radical via a dioxirane-type intermediate [Wadt and Goddard, 1975;Martinez et al, 1977]. Further reactions of the dioxy radical lead to a variety of'stable' products (aldehydes, acids) and free radicals.…”

“…In turn, unsaturated carbonyl compounds may react with ozone[Kamens et al, 1981b;Atkinson et al, 1981] to form dicarbonyls, carboxylic acids, and other oxygenated products. Because of the importance of isoprene as a Major features of the ozone-ethylene reaction mechanism, adapted fromMartinez et al [1977] Possible mechanism for ozone-monoterpene reaction, adapted from the cyclohexene-ozone mechanism ofGrosjean [1977] andGrosjean and Friedlander [1979].…”

Non-Metallic Ketone Compounds Catalyzed Selective Epoxidation of Styrene with Dry Air

“…Various strategies, methods and many effective catalytic systems have been developed for the preparation of epoxides from olefins [1][2][3][4][5][6][7][8][9][10][11]. Recently, the catalytic epoxidation with organic peroxides, H 2 O 2 , oxygen and air has become an especially attractive target.…”

The Full Optimized Reaction Space model for quantum chemical reaction calculations. Definition, applications, and IntraAtomic Correlation Correction extension

“…Lovas and Suenram (1977) found a number of microwave transitions attributable to an asymmetric top with a large dipole moment. Martinez, Huie and Herron (1977) confFrmed the HgCOg composition by mass spectrometry. The molecular, as opposed to radical, nature of the species was demonstrated by the ability of these researchers to repeatedly freeze and vaporize the intermediate.…”