Photochemistry and Strained Molecules

有机动力学计划支持光化学的研究， 在理查德教授的指导下， 位于达勒姆的新罕布什尔州大学的约翰逊说。 通过 结合实验和计算研究，约翰逊教授 探索高能有机物的形成和反应化学 具有扭曲多重键的化合物，包括小环1，2-二烯 例如1，2-环丁二烯和1，2-环戊二烯和1，2，3-三烯， 作为1，2，3-环丁三烯和1，2，3-环己三烯。 其他应变环 化合物，环丙烷菲，作为光化学 亚乙烯基、乙烯基卡宾、环亚丙基和其它的前体 卡宾。 发展对化学结构的基本理解， 反应性通常需要研究设计用于测试的化合物 关于化学键和稳定性的隐式和显式假设。 位于达勒姆的新罕布什尔州大学的理查德约翰逊教授说， 利用光能诱导分子的形成， 延伸这些假设的限制，重点是环状化合物， 考虑到简单的成键原理， 不可能存在。 这些研究除了 重要性的基础上，将导致新的路线， 具有生物活性的分子的制备方法及其制备方法 不寻常的聚合物材料，也可能揭示现象 在燃烧化学、富勒烯（“巴基球”）合成中观察到， 外星化学

The Organic Dynamics Program supports studies of photochemistry and strained molecules carried out under the direction of Professor Richard Johnson of the University of New Hampshire at Durham. Through a combination of experimental and calculational studies, Professor Johnson explores the formation and reaction chemistry of high-energy organic compounds with distorted multiple bonds, including small-ring 1,2-dienes such as 1,2-cyclobutadiene and 1,2-cyclopentadiene and 1,2,3-trienes such as 1,2,3-cyclobutatriene and 1,2,3-cyclohexatriene. Other strained-ring compounds, cyclopropanated phenanthrenes, serve as photochemical precursors to vinylidene, vinylcarbene, cyclopropylidene, and other carbenes. Development of a fundamental understanding of chemical structure and reactivity often requires the study of compounds designed to test implicit and explicit assumptions about chemical bonding and stability. Professor Richard Johnson, of the University of New Hampshire at Durham, uses the energy of light to induce the formation of molecules designed to stretch the limits of such assumptions, focusing on cyclic compounds for which consideration of simple bonding principles would predict impossibility of existence. These studies, in addition to their importance on the fundamental level, will lead to new routes for the preparation of molecules with biological activity and for the preparation of unusual polymeric materials, and may also shed light on phenomena observed in combustion chemistry, fullerene (`Bucky ball`) synthesis, and extraterrestrial chemistry.