Journal
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
Volume 225, Issue 9-10, Pages 957-967Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1524/zpch.2011.0138
Keywords
Triplet Methylene; Reaction With O-2; OH Yields; Branching Ratios
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Funding
- Engineering and Physical Sciences Research Council [GR/T28560/01] Funding Source: researchfish
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The kinetics of and the yield of OH in the reaction (CH2)-C-3 + O-2 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(upsilon = 0, 1) are (2.39 +/- 0.26) and (2.33 +/- 0.28) x 10(-12) cm(3) molecule(-1) s(-1) respectively. The rate coefficient for (CH2)-C-3 + NO was also measured from the growth of the OH(upsilon = 1) signal, giving k(3) = (4.52 +/- 0.48) x 10(-11) cm(3) molecule(-1) s(-1). The ratio of the yields of OH in the two reactions (CH2)-C-3 + O-2 and (CH2)-C-3 + NO was determined from analysis of back-to-back OH profiles with O-2 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 (CH2)-C-3 + O-2 and (CH2)-C-3 + NO at similar to 300 K.
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