Reactions of O(3P) with alkyl iodides: Rate coefficients and reaction products
Reactions of O(3P) with alkyl iodides: Rate coefficients and reaction products
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DOI：
10.1021/jp960688v
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发表时间：
1996-08
期刊：
影响因子：
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通讯作者：
M. Gilles;A. A. Turnipseed-A.;R. Talukdar;Y. Rudich;Peter W. Villalta;L. Huey;J. B. Burkholder;A. Ravishankara
中科院分区：
文献类型：
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作者：
M. Gilles;A. A. Turnipseed-A.;R. Talukdar;Y. Rudich;Peter W. Villalta;L. Huey;J. B. Burkholder;A. Ravishankara
测得O(3P)与CF3I(1)和CH3I(2)在213K和364K之间的反应速率系数分别为：K1(T)=(7.9±0.8)×10-12exp[−(175±40)/T]和K2(T)=(1.0±0.2)x10-11exp[(160±50)/T]cm3分子-1 S-1。测定了298K时O(3P)与CD3I、(CH3)2CHCH2I、(CH3)2CHI、CF3CH2I、CF3CHFI和CF3CF2I反应的速率系数。在298K时，反应1中IO和CF3O的产率分别为0.83±0.09和0.01。298K时反应2的产物产率分别为IO(0.44±0.04)、OH(0.16±0.05)、H(0.07±0.02)、CH3O(<；0.03)和HI(<；0.05)。用激光诱导荧光法检测IO、OH和CH3O，用共振荧光法检测O和H原子，用化学电离质谱仪检测IO、CF3O和HI。反应1和反应2的IO产率与温度呈轻微的正相关。在我们的实验误差范围内，反应2的羟基产率与温度无关。格式热的上限……
The rate coefficients for the reactions of O(3P) with CF3I (1) and CH3I (2) were measured between 213 and 364 K to be: k1(T) = (7.9 ± 0.8) x 10-12 exp[−(175 ± 40)/T] and k2(T) = (1.0 ± 0.2) x 10-11 exp[(160 ± 50)/T] cm3 molecule-1 s-1. The rate coefficients for the reaction of O(3P) with CD3I, (CH3)2CHCH2I, (CH3)2CHI, CF3CH2I, CF3CHFI, and CF3CF2I at 298 K were also measured. The yields of the IO and CF3O products in reaction 1 at 298 K were found to be 0.83 ± 0.09 and <0.01, respectively. Product yields of reaction 2 at 298 K were measured to be IO (0.44 ± 0.04), OH (0.16 ± 0.05), H (0.07 ± 0.02), CH3O (<0.03), and HI (<0.05). IO, OH, and CH3O were detected via laser-induced fluorescence, O and H atoms via resonance fluorescence, and IO, CF3O, and HI by chemical ionization mass spectrometry. The IO yield from reactions 1 and 2 showed a slight positive temperature dependence. Within our experimental error the OH yield from reaction 2 was temperature independent. An upper limit for the enthalpy of formati...