Low temperature rate coefficients for the reactions of CN and C2H radicals with allene (CH2=C=CH2) and methyl acetylene (CH3C≡CH)

被引：91

作者：

Carty, D ^{[1
]}

Le Page, V ^{[1
]}

Sims, IR ^{[1
]}

Smith, IWM ^{[1
]}

机构：

[1] Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 344卷 / 3-4期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S0009-2614(01)00682-0

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：

Using a continuous flow CRESU (Cinetique de Reaction en Ecoulement Supersonique Uniforme or Reaction Kinetics in Uniform Supersonic Flow) apparatus, rate coefficients have been measured for the reactions of the cyanogen (CN) and ethynyl (C2H) radicals with allene (CH2=C-CH2) and methyl acetylene (CH3C=CH) at temperatures from 295 down to 15 K for the reactions of CN and down to 63 K for those Of C2H. All four reactions occur at rates close to the collision-determined limit. The results are compared with those obtained earlier for the reactions of other alkenes and alkynes, and, in the accompanying Letter by Vakhtin et al., with results for C2H + CH2=C=CH2 and C2H + CH3C=CH obtained at 103 K using a pulsed Laval apparatus. The implications of these latest results for the chemistry of interstellar clouds and planetary atmospheres are discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：310 / 316

页数：7

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