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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Ed. by Rademann, Klaus

12 Issues per year

IMPACT FACTOR 2016: 1.012

CiteScore 2016: 0.99

SCImago Journal Rank (SJR) 2016: 0.463
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Volume 225, Issue 9-10 (Oct 2011)


3CH2 + O2: Kinetics and Product Channel Branching Ratios

Mark A. Blitz / Claudia Kappler / Michael J. Pilling / Paul W. Seakins
Published Online: 2011-09-23 | DOI: https://doi.org/10.1524/zpch.2011.0138


The kinetics of and the yield of OH in the reaction 3CH2 + O2 has been studied at room temperature using pulsed laser photolysis of ketene at 351 nm with detection of OH by LIF. The kinetics were determined from a biexponential analysis of the growth and decay of the OH signal. The rate coefficients obtained from the profiles for OH(v=0,1) are (2.39 ± 0.26) and (2.33 ± 0.28) × 1012 cm3 molecule−1 s−1 respectively. The rate coefficient for 3CH2 + NO was also measured from the growth of the OH(v=1) signal, giving k3 = (4.52 ± 0.48) × 1011 cm3 molecule−1 s−1. The ratio of the yields of OH in the two reactions 3CH2+O2 and 3CH 2+NO was determined from analysis of back to back OH profiles with O2 and NO as co-reactant; the ratio obtained, at 300 K, was 2.96 ± 0.14. This result was combined with other experimental product yields on these two reactions to obtain a consistent set channel yields for 3CH2+O2 and 3CH2+NO at ∼300 K.

Keywords: triplet methylene; reaction with O2; OH yields; branching ratios

About the article

* Correspondence address: University of Leeds, School of Chemistry, Leeds, LS2 9JT, Großbritannien

Published Online: 2011-09-23

Published in Print: 2011-10-01

Citation Information: Zeitschrift für Physikalische Chemie, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1524/zpch.2011.0138.

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