Kinetics of the CN+CH2CO and NCO+CH2CO reactions

被引：21
|
作者：
Edwards, MA [1 ]
Hersberger, JF [1 ]
机构：
[1] N Dakota State Univ, Dept Chem, Fargo, ND 58105 USA
来源：
CHEMICAL PHYSICS | 1998年 / 234卷 / 1-3期
关键词：
kinetics; ketene; radical reactions;
D O I：
10.1016/S0301-0104(98)00174-8
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 CN + CH2CO and NCO + CH2CO reactions were studied over the temperature ranges 296-567 K and 296-556 K, respectively, using time-resolved infrared diode laser absorption and visible laser-induced fluorescence spectroscopy. The total rate constant data were fit to the following expressions: k(1)(CN + CH2CO) = (2.37 +/- 0.5) X 10(-11) exp[552.6 +/- 97/T] and k(2)(NCO + CH2CO) = (1.71 +/- 0.27) X 10(-12) exp[713.2 +/- 56/T] cm(3) molecule(-1) s(-1). Detection and quantification of CO product yields suggests that an addition-elimination mechanism producing CH2CN + CO or CH2NCO + CO dominates these reactions, and that hydrogen abstraction to produce HCN + HCCO or HNCO + HCCO is a minor or negligible product channel. (C) 1998 Elsevier Science B.V. All rights reserved.
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收藏
页码：231 / 237
页数：7
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