Methylperoxy self-reaction: products and branching ratio between 223 and 333 K

Horie, Osamu; Crowley, John N.; Moortgat, G. K.

doi:10.1021/j100384a040

Cited by 24 publications

(31 citation statements)

References 3 publications

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“…The CO/CO2 ratio can only be given indirectly. An estimate puts it quite close to the values found by Rowland [7] and Horie [9] at higher pressures where one might expect a somewhat lower contribution of radical forming reaction channels. More precise specifications of the channel distribution, which are clearly desirable, would require simultaneous in situ determinations of, at least, CO, H, HCO, and OH with high time resolution, which could only be achieved by combinations of several further experimental methods.…”

Section: Discussionsupporting

confidence: 86%

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Investigations of the reaction between CH₂(X̃³B₁) and O₂ in the temperature range 233 K ≤ T ≤ 433 K

Bley¹,

Temps²,

Wagner³

et al. 1992

Ber Bunsenges Phys Chem

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The reaction bctween CH2(R3Bl) radicals ('CH,) and 02, 'CH2 + 02+ products,has been studied in a discharge flow reactor with Laser Magnetic Resonance (LMR) detection of 'CH2 and OH radicals and Electron Spin Resonance detection of 0 and H atoms. From the measured concentration-versus-time profiles of C3CH2] in the absence and presence of a large excess of O2 the overall rate coeficient of the reaction was found to be k , = (8.7 k2.0). 10". exp[ -(4.2 f 1 .O)kJ. mol-'/R. T]cm'/mol. s in the temperature range 233 K I T 5 433 K. A limit for the contribution of H atom forming reaction channels of <20% was determined. The results are discussed in relation to available literature data on the formation of stable products. Main reaction channels leading directly to production of CO + HzO and H2 + C 0 2 are concluded to be of importance.

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Section: Discussionsupporting

confidence: 86%

“…It is noted that H2C0, which is complementary to 0 atoms, has been detected as well both in the reactions 'CH2 + O2 (see, e.g. [6,9,111) and 'CH2 + O2 [43]. However, it is not anlways clear whether the observed H2C0 is indeed a primary product.…”

Section: Discussionmentioning

confidence: 99%

Investigations of the reaction between CH₂(X̃³B₁) and O₂ in the temperature range 233 K ≤ T ≤ 433 K

Bley¹,

Temps²,

Wagner³

et al. 1992

Ber Bunsenges Phys Chem

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“…The use of complementary techniques in these studies removes the ambiguity introduced by simple UV absorption, while also opening up possibilities for the time-resolved detection of reaction products in the infrared. 60 The product yields of Horie et al 144 show that the yield of methoxy radicals increases with increasing temperature.…”

Section: For Example Atkinson and Spillman 35 Measured The Decay Of mentioning

confidence: 97%

Laboratory studies of organic peroxy radical chemistry: an overview with emphasis on recent issues of atmospheric significance

2012

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Organic peroxy radicals (often abbreviated RO(2)) play a central role in the chemistry of the Earth's lower atmosphere. Formed in the atmospheric oxidation of essentially every organic species emitted, their chemistry is part of the radical cycles that control the oxidative capacity of the atmosphere and lead to the formation of ozone, organic nitrates, organic acids, particulate matter and other so-called secondary pollutants. In this review, laboratory studies of this peroxy radical chemistry are detailed, as they pertain to the chemistry of the atmosphere. First, a brief discussion of methods used to detect the peroxy radicals in the laboratory is presented. Then, the basic reaction pathways - involving RO(2) unimolecular reactions and bimolecular reactions with atmospheric constituents such as NO, NO(2), NO(3), O(3), halogen oxides, HO(2), and other RO(2) species - are discussed. For each of these reaction pathways, basic reaction rates are presented, along with trends in reactivity with radical structure. Focus is placed on recent advances in detection methods and on recent advances in our understanding of radical cycling processes, particularly pertaining to the complex chemistry associated with the atmospheric oxidation of biogenic hydrocarbons.

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“…The production of the observed amounts of HCHO in the early stages of photolysis and some of the other products which are produced from the chemistry of CH,CO, is indicative of the decomposition of the CH,COCH,O radical formed by the self reaction of CH3COCH,0,[reaction (3u) In order to test whether reaction ( 13) was competing with reaction (1 2), similar experiments were performed for a range of [O,], and the influence on the observed products in general, and on CH,COCHO and HCHO in particular, was investigated. Yields of CH,COCHO and HCHO as a function of time, relative to acetone lost by reaction with C1 atoms, are displayed in Table 3 for three experiments with [O,] = 2.0 x lo", 4.9 x 10l8 and 1.7 x lo" molecule cm-,.…”

Section: Pbotolysis Of C1 In the Presence Of Acetone And 0mentioning

confidence: 96%

Mechanisms of the Cl-atom-initiated oxidation of acetone and hydroxyacetone in air

Jenkin¹,

Cox²,

Emrich³

et al. 1993

Faraday Trans.

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Methylperoxy self-reaction: products and branching ratio between 223 and 333 K

Cited by 24 publications

References 3 publications

Investigations of the reaction between CH₂(X̃³B₁) and O₂ in the temperature range 233 K ≤ T ≤ 433 K

Investigations of the reaction between CH₂(X̃³B₁) and O₂ in the temperature range 233 K ≤ T ≤ 433 K

Laboratory studies of organic peroxy radical chemistry: an overview with emphasis on recent issues of atmospheric significance

Mechanisms of the Cl-atom-initiated oxidation of acetone and hydroxyacetone in air

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Methylperoxy self-reaction: products and branching ratio between 223 and 333 K

Cited by 24 publications

References 3 publications

Investigations of the reaction between CH2(X̃3B1) and O2 in the temperature range 233 K ≤ T ≤ 433 K

Investigations of the reaction between CH2(X̃3B1) and O2 in the temperature range 233 K ≤ T ≤ 433 K

Laboratory studies of organic peroxy radical chemistry: an overview with emphasis on recent issues of atmospheric significance

Mechanisms of the Cl-atom-initiated oxidation of acetone and hydroxyacetone in air

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Investigations of the reaction between CH₂(X̃³B₁) and O₂ in the temperature range 233 K ≤ T ≤ 433 K

Investigations of the reaction between CH₂(X̃³B₁) and O₂ in the temperature range 233 K ≤ T ≤ 433 K