Gas-phase reactivity study of O(3P) atoms with trans-CHClCHCl and CHClCCl2 at 298 K: Comparison to reactions with some other substituted ethenes

✍ Scribed by Mariano A. Teruel; Raúl A. Taccone; Silvia I. Lane

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 106 KB
• Volume: 33
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.1037

✦ Synopsis

Abstract

Absolute rate coefficients for the gas‐phase reactions of trans‐dichloroethene and trichloroethene with O(^3^P) atoms have been measured at 298 K using a discharge flow tube coupled to a chemiluminescence detection system. The observed rate constant values are (2.2 ± 0.4) × 10^−13^ and (1.4 ± 0.2) × 10^−13^ cm^3^ molecule^−1^ s^−1^, respectively. The experiments were carried out under pseudo‐first‐order conditions with [O(^3^P)]~o~ ≪ [alkene]~o~. These results are compared to those of O atom reactions with other chloroethenes and with different electrophiles, such as OH and NO~3~. Different factors that affect the rate of addition to the double bond are considered. The rate constants for these reactions do not correlate in a simple manner with the experimental ionization potential, as is the case in the alkene and methyl‐substituted alkene reactions. © 2001 John Wiley & Sons, Inc. Int J Chem Kinet 33: 415–421, 2001