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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Kinetic Studies of Isoprene Reactions Initiated by Chlorine Atom
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Kinetic Studies of Isoprene Reactions Initiated by Chlorine Atom

机译：氯原子引发的异戊二烯反应的动力学研究

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The degradation reactions of isoprene initiated by chlorine atom were investigated using a fast-flow reactor coupled to chemical ionization mass spectrometry (CIMS) detection. The kinetic studies were performed in the pressure range of 5 to 10 Torr and at 298 ± 2 K. The rate constant for the reaction between Cl and isoprene was measured to be (4.0 ± 0.3) * 10~(-10) cm~3 molecule~(-1) s~(-1). Using the CIMS method, we were able to directly detect the products of the Cl-isoprene reaction, HCl and Cl-isoprene adduct. A branching ratio of (17.4 ± 4.0)% was determined for the HCl formation. We have also measured the rate constant for the reaction of the Cl-isoprene adduct with molecular oxygen to form the β-chloroalkenylperoxy radicals, with a value of (1.0 ± 0.3) * 10~(-14) cm~3 molecule~(-1) s~(-1). Atmospheric implications of the present experimental results are discussed.
机译：使用与化学电离质谱（CIMS）检测耦合的快速流反应器，研究了由氯原子引发的异戊二烯的降解反应。在5 to 10 Torr的压力范围内和298±2 K上进行动力学研究。测得Cl与异戊二烯之间的反应速率常数为（4.0±0.3）* 10〜（-10）cm〜3分子〜（-1）s〜（-1）。使用CIMS方法，我们能够直接检测Cl-异戊二烯反应，HCl和Cl-异戊二烯加合物的产物。确定HCl的支化率为（17.4±4.0）％。我们还测量了Cl-异戊二烯加合物与分子氧反应形成β-氯烯基过氧自由基的速率常数，其值为（1.0±0.3）* 10〜（-14）cm〜3分子〜（- 1）s〜（-1）。讨论了当前实验结果对大气的影响。

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