Catalysis and Mechanism in Nucleophilic Aromatic Photosubstitution

均相光化学反应的催化研究 亲核芳烃的反应及机理 将进行光取代反应。由 布朗斯台德催化定律图的测定， 涉及氢氧根离子的电子空穴转移催化将 获得。此外，结构要求， 控制着碱催化与猝灭竞争的情况 将被定义。中间结构的同一性 参与分子内氢的光致位移， 芳环将被确定，并首次 芳香亲核光取代反应中的“元素效应” 将被阐明。 %%% 有机动力学项目的拨款将支持 光诱导芳香亲核取代反应的研究 G教授的实验室。G. Wubbels在华盛顿 学院研究的重点将是探索 布朗斯台德催化图的性质，从而提供 电子空穴催化的决定性证据， 氢氧根离子。阐明了结构参数， 管理这些过程将导致更多的发展 产生取代芳族化合物的有效方法 化合物.

An investigation of catalysis of homogeneous photochemical reactions and mechanisms of nucleophilic aromatic photosubstitution reactions will be conducted. By the determination of Bronsted Catalysis Law plots, evidence for electron hole transfer catalysis involving hydroxide ion will be obtained. In addition, the structural requirements which govern instances where base catalysis competes with quenching will be defined. The identity of intermediate structures involved in intramolecular photodisplacement of hydrogen on an aromatic ring will be determined, and for the first time the "element effect" on nucleophilic aromatic photosubstitution will be elucidated. %%% This grant from the Organic Dynamics Program will suport research on photoinduced nucleophilic aromatic substitution in the laboratoty of Professor G. G. Wubbels at Washington College. The focus of the research will be to explore the nature of Bronsted Catalysis plots and thereby provide definitive evidence for electron hole catalysis involving hydroxide ion. Elucidation of the structural parameters which govern such processes will lead to the development of more efficient methods for generating substituted aromatic compounds.