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

在实验物理化学计划的这个项目中，里昂学院的Bert Holmes得到了本科院校研究奖的资助，该奖项旨在利用化学活化测量一系列涉及卤素的气相反应的单分子和双分子速率常数。研究将包括将确定其过渡态性质的卤代烷的1，2-脱氢卤化反应，以及将确定其速率常数和阈值能垒的化学活化的卤代醇的1，2-脱水。这些研究的结果将被用来检验最近关于卤代烷基双分子反应过渡态的理论。这项工作将提供对导致臭氧消耗的一些反应的更好的理解。此外，这项工作将为本科生追求化学职业提供强大的动力。臭氧消耗是一个复杂的问题，涉及气相、液相和界面反应。为了理解这个问题，必须测量和理解已知的导致臭氧消耗的分子的典型单分子和双分子反应。霍姆斯教授的工作将解决这个严重问题中涉及的一些问题，同时让本科生有机会在一个及时而重要的领域进行实验。

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.