GAS-PHASE RATE COEFFICIENTS FOR THE O(3P) REACTIONS WITH 2-CHLOROPROPENE AND 3-CHLOROPROPENE AT 298K USING THE DISCHARGE FLOW TECHNIQUE

COMETTO, P. M., BLANCO, M. B., TERUEL M. A., TACCONE R. A. AND LANE S. I.

The Journal of the Argentine Chemical Society

Año: 2005 p. 163 - 173

The kinetics of the O(3P) + CH2=CClCH3 and O(3P) + CH2=CHCH2Cl reactions were studied at room temperature in a discharge flow tube system. The overall rate constants based on the measured afterglow reactions were (3.15 ± 0.17) × 10-12 and (1.35 ± 0.08) × 10-12 in units of cm3 molecule-1 s-1, respectively. The experiments were carried out under molecule-1 s-1, respectively. The experiments were carried out under in units of cm3 molecule-1 s-1, respectively. The experiments were carried out under pseudo-first-order conditions with [O(3P)]o << [chloropropene]o. The rate constant for the O(3P) + CH2=CHCH2Cl reaction is compared with a previous measurement using a different detection technique. This is the first determination of the rate constant of the O(3P) + CH2=CClCH3 reaction. The effect of substituent atoms or groups on the overall rate constants is analyzed in comparison with other propenes in the literature. The correlation of rate constant with the ionization potential of the alkene is also discussed.