Kinetics of Unimolecular and Bimolecular Reactions of Halocarbons and Haloalcohols in the Gas Phase

在这个实验物理化学项目中，里昂学院的伯特·霍姆斯（Bert Holmes）得到了一项本科院校研究奖的资助，他利用化学活化方法测量了一系列涉及卤烃的气相反应的单分子和双分子速率常数。研究将包括卤代烷的1,2-脱氢卤化反应，其过渡态的性质将被确定，以及化学活化的卤代醇的1,2-脱水反应，其速率常数和阈值能垒将被确定。这些研究的结果将用于检验最近关于卤代烷基自由基双分子反应过渡态的理论。这项工作将使人们更好地了解导致臭氧耗竭的一些反应。此外，这项工作将为本科生追求化学事业提供强大的动力。臭氧消耗是一个涉及气相、液相和界面反应的复杂问题。为了了解这个问题，必须测量和了解已知的导致臭氧消耗的典型单分子和双分子反应。霍尔姆斯教授的工作将解决这一严重问题所涉及的一些问题，同时给本科生在一个及时和重要的领域进行实验的机会。

In this project in the Experimental Physical Chemistry Program, Bert Holmes of Lyon College is funded by a Research in Undergraduate Institutions award to measure unimolecular and bimolecular rate constants for a series of gas-phase reactions involving halocarbons using chemical activation. Studies will include the 1,2-dehydrohalogenation of haloalkanes for which for which the nature of the transition states will be determined, and 1,2-dehydration of chemically activated haloalcohols for which rate constants and threshold energy barriers will be determined. The results from these studies will be used to test recent theories concerning transitions states for bimolecular reactions of haloalkyl radicals. This work will provide an improved understanding of some of the reaction resulting in ozone depletion. Additionally, the work will provide strong motivation for undergraduate students to pursue careers in chemistry. Ozone depletion is a complex problem involving gas-phase, liquid-phase, and interfacial reactions. In order to understand the problem, typical unimolecular and bimolecular reactions of molecules known to contribute to ozone depletion must be measured and understood. Professor Holmes' work will address some of the issues involved in this serious problem, while at the same time giving undergraduate students the opportunity to perform experiments in a timely and important area.