New Carbon-Carbon Coupling Reactions and New Metal Chalcogen Structures

新的碳-碳偶联反应和新的金属硫属元素结构

• 批准号: 9006721
• 负责人: Mary Rakowski DuBois
• 金额: $ 7.35万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-01 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9006721&HistoricalAwards=false
• 关键词: New; Carbon; Coupling; Reactions; Metal

The Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division continues support to Dr. Mary Rakowski-DuBois of the Chemistry Department, University of Colorado at Boulder, for studies of carbon-carbon coupling reactions and synthesis of dinuclear compounds containing metals with vacant coordination sites. Binuclear molybdenum compounds with sulfide and hydrosulfide bridging ligands have been synthesized and found to catalyze the oligomerization of isobutene. Investigation of the mechanism of this reaction is planned so that the selectivity and stability of this catalyst can be compared to known catalysts for similar reactions. One part of the investigation will focus on reaction surveys, stoichiometric reactions, and Extended Huckel Molecular Orbital calculations to investigate the reaction mechanism. A second part of the project will be to synthesize new compounds in which the bridging and/or terminal ligands have been altered to enhance catalytic activity either by placing the substrate in proximity of the hypothetically critical bridging ligand or by increasing the likelihood that a vacant coordination site will form.

化学部的无机、生物无机和有机金属计划继续支持科罗拉多大学博尔德分校化学系的Mary Rakowski-DuBois博士研究碳-碳偶联反应和合成含有空缺配位的金属双核化合物。合成了含硫化物和硫氢化桥联配体的双核钼化合物，发现它们能催化异丁烯齐聚反应。计划对该反应的反应机理进行研究，以便将该催化剂的选择性和稳定性与同类反应的已知催化剂进行比较。研究的一部分将集中在反应调查、化学计量反应和扩展的休克尔分子轨道计算，以研究反应机理。该项目的第二部分将是合成桥联和/或末端配体已被改变的新化合物，以通过将底物放置在假设的关键桥联配体附近或通过增加形成空位配位的可能性来提高催化活性。