Spectroscopy and Reactivity of Organic Radicals

有机自由基将在气相中制备， 记录相应的红外吸收光谱。 中 另一组实验，利用流动的余辉 气体中碳氢自由基的反应性 将研究具有负离子的相。 气相 待产生和研究的物质包括甲基，乙烯基， 烯丙基、丙二烯、苯基和苄基。 激进分子会 通过热解超音速射流产生， 温度喷嘴。 光电离质谱仪将 被用来跟随热解流出物的头部， 氧化锆喷嘴 %%% 来自有机动力学计划的这笔赠款支持 自由基和双自由基及其反应的研究 在气相中的各种物质的指导下， 教授G。B。埃里森在科罗拉多大学。 一些 在许多反应过程中产生的最具反应性的物质， 化学变换是自由基，其中包含一个 不成对电子和含有两个不成对电子的双自由基 电子。 而之前大多数关于有机的研究 自由基涉及液体溶液中的反应，教授 埃里森会在气相中产生活性自由基 高温喷嘴。 激进分子就会暴露 带电的气相分子流和化学物质 直接观察随后的化学转化。 实验结果与计算机的比较 模拟将有助于更好地了解 自由基和双自由基的反应。

Organic radicals will be prepared in the gas phase and the corresponding infrared absorption spectra recorded. In a separate set of experiments, utilizing a flowing afterglow apparatus, the reactivity of hydrocarbon radicals in the gas phase with negative ions will be investigated. Gas phase species to be generated and studied include methyl, vinyl, allyl, allene, phenyl, and benzyl radicals. The radicals will be produced via a pyrolysis supersonic jet with a high temperature nozzle. A photoionization mass spectrometer will be employed to follow the pyrolysis effluent at the head of a zirconia nozzle. %%% This grant from the Organic Dynamics Program supports an investigation of radicals and biradicals and their reactions with a variety of species in the gas phase under the direction of Professor G. B. Ellison at the University of Colorado. Some of the most reactive species produced during the course of many chemical transformations are radicals, which contain one unpaired electron, and biradicals, which contain two unpaired electrons. Whereas most of the previous work with organic radicals involved reactions in liquid solutions, Professor Ellison will generate reactive radical species in the gas phase with a high temperature nozzle. The radicals will be exposed to a stream of charged gas phase molecules and the chemical subsequent chemical transformations observed directly. Comparison of the experimental results with computer simulations will lead to a better understanding of the reactions of radicals and biradicals.