Product branching ratios in simple gas phase reactions
Product branching ratios in simple gas phase reactions
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DOI：
10.1039/b605650b
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发表时间：
2007-06
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影响因子：
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通讯作者：
P. Seakins
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文献类型：
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作者：
P. Seakins
人们早就知道，在多通道反应中，不同产物之间的分支比与反应的总速率一样重要，无论是在实际应用方面（例如燃烧或大气化学模型），还是在理解这些化学反应的基本机制方面。然而，只有在过去的10-15年，实验和理论工具已经成为可用的定量解决相关条件下的产品分支比的问题。本文回顾了实验和理论技术的相关发展，然后考虑了多通道反应的例子。首先，我们研究了通过相同的基本机制（例如抽象或加成）发生的位点特异性反应的情况，然后继续回顾了与结合配合物形成并随后单分子分解成多组产物的多通道反应的类别。考虑的最后一类反应是两种不同机制之间的竞争，例如抽象与加法。最后，对该领域可能的发展作了简要展望。
It has long been known that the product branching ratio between different products in multichannel reactions is as important as the overall rate of reaction, both in terms of practical applications (e.g. models of combustion or atmospheric chemistry), and in understanding the fundamental mechanisms of such chemical reactions. However, it is only in the last 10–15 years that the experimental and theoretical tools have become available to quantitatively address the issue of product branching ratios under relevant conditions. This article includes a review of relevant developments in experimental and theoretical techniques and then considers examples of multichannel reactions. Firstly we examine the case of site specific reactions taking place via the same basic mechanism, e.g. abstraction or addition and then move on to review the class of multichannel reactions occurring with the formation of a bound complex with subsequent unimolecular decomposition to multiple sets of products. The final class of reactions considered is where there is a competition between two different mechanisms e.g. abstraction vs. addition. The review is concluded with a brief outlook on to possible developments in the field.