ABSOLUTE RATE CONSTANTS FOR ELEMENTARY REACTIONS BETWEEN CHLORINE ATOMS AND CHF2CL, CH3CFCL2, CH3CF2CL AND CH2FCF3 AT 297+/-2-K

被引：31

作者：

SAWERYSYN, JP

TALHAOUI, A

MERIAUX, B

DEVOLDER, P

机构：

[1] Laboratoire de Cinétique et Chimie de la Combustion, Université des Sciences et Technologies de Lille, URA CNRS 876, 59655 Villeneuve D'Ascq Cédex

来源：

CHEMICAL PHYSICS LETTERS | 1992年 / 198卷 / 1-2期

关键词：

D O I：

10.1016/0009-2614(92)90071-T

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The reactions of chlorine atoms with CHF2Cl, CH3CFCl2, CH3CF2Cl and CH2FCF3 have been investigated at 297 +/- 2 K and 3-6 Torr under pseudo-first-order conditions with an excess of chlorine atoms by means of the discharge flow technique coupled to a mass spectrometer (DF/MS). The following absolute rate constants were obtained in units of cm3 molecule-1 s-1: HCFC-22, (1.7 +/- 0.2)x10(-15); HCFC-141b, (2.1 +/- 0.2)x10(-15); HCFC-142b, (5.6 +/- 2.0)X10(-16) and HFC-134a, (1.6 +/- 0.3) x 10(-15). Quoted errors are +/- 2sigma. These values are in good agreement with those determined previously by relative or absolute methods. The role of these reactions under tropospheric conditions is discussed.

引用

页码：197 / 199

页数：3

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