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1631827 
Journal Article 
Kinetics and Mechanism of the Reactions of n-Butanal and n-Pentanal with Chlorine Atoms 
Singh, S; Hernandez, S; Ibarra, Y; Hasson, AS 
2009 
Yes 
International Journal of Chemical Kinetics
ISSN: 0538-8066
EISSN: 1097-4601 
41 
2 
133-141 
WOS:000262553500008 
The kinetics and mechanism of the reaction of chlorine atoms
with n-butanal and n-pentanal have been investigated in a 142-L reaction cell coupled to a
Fourier transform infrared (FTIR) spectrometer at 298 +/- 2 K and at 800 +/- 3 Torr. The rate
coefficients for Cl + n-butanal and Cl + n-pentanal were measured using the relative rate
technique with isopropanol and ethene as the reference compounds. The yield of acyl radicals was
determined by measuring yields of acid chloride and carbon monoxide products from the reaction of
Cl + aldehyde in the absence of oxygen. The rate coefficients for Cl + n-butanal and Cl + n-
pentanal are (1.63 +/- 0.59) x 10(-10) cm(3) molecule(-1) s(-1) and (2.37 +/- 0.82) x 10(-10) cm
(3) molecule(-1) s(-1), respectively. The yields of acyl radicals from the reactions are 0.66 +/-
0.04 for n-butanal and 0.45 +/- 0.04 for n-pentanal. Under ambient conditions, the acyl radicals
generated will react almost exclusively with oxygen, Mechanistic implications of these
measurements are discussed. (C) 2008 Wiley Periodicals, Inc. Int J Chem Kinet 41: 133-141, 2009