Biradical-Like Reactive Intermediates

双自由基类反应中间体

• 批准号: 9020896
• 负责人: Josef Michl
• 金额: $ 87.1万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-01 至 1994-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9020896&HistoricalAwards=false
• 关键词: Biradical; Like; Reactive; Intermediates

This grant from the Organic Dynamics Program supports the continuing work of Dr. Josef Michl at the University of Colorado. This work will provide new insights into the nature of short-lived intermediates that are formed in the course of chemical reactions and will also develop new approaches to chemical measurements using a "molecular-size construction set." The experiments that will be carried out by Dr. Michl fall into two categories. The first is focused on biradical intermediates, which will be generated by photolytic or pyrolytic processes and than be trapped in a low-temperature, inert-gas matrix. Electronic and vibrational spectroscopic studies will afford an improved understanding of the structure and reactivity of these unstable species. The second category is centered on Michl's staffane hydrocarbons, which are rod-like molecules made up of recurring bicyclo ı1.1.0! pentane subunits. These "molecular Tinkertoys" provide a unique opportunity for studying the transmission of electronic effects through a molecular framework. Professor Michl will also take advantage of the linear shape of these molecules to link these molecules together and form supramolecular assemblies with well-defined molecular structures.

来自有机动力学项目的这笔赠款支持了科罗拉多大学约瑟夫·米克尔博士的继续工作。这项工作将为了解化学反应过程中形成的短暂中间体的性质提供新的见解，并将开发使用“分子大小结构集”进行化学测量的新方法。米克尔博士将进行的实验分为两类。第一个重点是双自由基中间体，它们将通过光解或热解过程产生，然后被捕获在低温的惰性气体基质中。电子和振动光谱研究将提供对这些不稳定物种的结构和反应性的更好的理解。第二类是以Michl的员工碳氢化合物为中心的，这是由循环的自行车ı1.1.0组成的棒状分子！正戊烷亚基。这些“分子叮当玩具”为研究电子效应通过分子框架的传输提供了独特的机会。米克尔教授还将利用这些分子的线性形状将这些分子连接在一起，形成具有明确分子结构的超分子组装。