1992
DOI: 10.1002/bbpc.19920960814
|View full text |Cite
|
Sign up to set email alerts
|

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

Abstract: 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 2… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

3
24
0

Year Published

1995
1995
2019
2019

Publication Types

Select...
8

Relationship

0
8

Authors

Journals

citations
Cited by 30 publications
(27 citation statements)
references
References 41 publications
(14 reference statements)
3
24
0
Order By: Relevance
“…The reaction of O atoms with CH 2 CO has been used in flow systems as a clean radical source. 41 A significant product channel is the formation of triplet CH 2 ϩCO 2 . 42 The formation of triplet CH 2 has been previously inferred from secondary reactions initiated by the F atom attack on CH 3 I yielding both CH 3 ϩIF and CH 2 IϩHF.…”
Section: Discussionmentioning
confidence: 99%
“…The reaction of O atoms with CH 2 CO has been used in flow systems as a clean radical source. 41 A significant product channel is the formation of triplet CH 2 ϩCO 2 . 42 The formation of triplet CH 2 has been previously inferred from secondary reactions initiated by the F atom attack on CH 3 I yielding both CH 3 ϩIF and CH 2 IϩHF.…”
Section: Discussionmentioning
confidence: 99%
“…All four are, within experimental error, in agreement with the room temperature value measured in this study. There has also been one previous temperature-dependent study by Bley et al (1992), who used a discharge flow reactor with laser magnetic resonance detection of 3 CH2 and OH radicals, and electron spin resonance detection of O and H atoms. The positive temperature dependence reported by Bley et al (1992) is inconsistent with the observations from this study which suggest a small negative temperature dependence.…”
Section: Kineticsmentioning
confidence: 99%
“…There has also been one previous temperature-dependent study by Bley et al (1992), who used a discharge flow reactor with laser magnetic resonance detection of 3 CH2 and OH radicals, and electron spin resonance detection of O and H atoms. The positive temperature dependence reported by Bley et al (1992) is inconsistent with the observations from this study which suggest a small negative temperature dependence. The room temperature rate coefficient reported by Bley et al (1992) is also significantly lower (by ~ 60 %) than those reported in this and the other studies, and also has H atom yields which differ with the other literature; the disagreements in both kinetics and BR suggest that study may have been subject to unidentified systematic errors.…”
Section: Kineticsmentioning
confidence: 99%
“…The depletion rate of CH 2 (ã 1 A 1 ) by O 2 has been claimed to be about 10 times more rapid than that of CH 2 (X 3 B 1 ). [50][51][52] However, Hancock and Haverd proposed that CH 2 (ã 1 A 1 ) is first quenched by O 2 to the triplet state CH 2 (X 3 B 1 ), followed by reaction with O 2 producing CO 2 . 49 In other words, the production rate constants of CO 2 from either CH 2 (ã 1 A 1 ) or CH 2 (X 3 B 1 ) are the same.…”
Section: A Reaction Of Ch 2 With Omentioning
confidence: 99%