New Methods for Polyhedral Borane Synthesis

多面体硼烷合成新方法

• 批准号: 9423951
• 负责人: Larry Sneddon
• 金额: --
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-04-01 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9423951&HistoricalAwards=false
• 关键词: New; Methods; Polyhedral; Borane; Synthesis

Dr. Larry G. Sneddon, Chemistry Department, University of Pennsylvania, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division to develop new general methodologies that enable the systematic, high yield preparation of polyhedral boron clusters. In this project a variety of new approaches for the syntheses and modification of polyhedral boron compounds will be designed. These include: new types of carbon and nitrogen cage-insertion reactions involving the nucleophilic attack of polyhedral boron anions on nitriles and polar-acetylenes; metal-catalyzed reactions of polyhedral boranes with acetylenes, olefins, and/or carbon monoxide; and new types of sulfur-atom insertion reactions leading to thia- and dithiaboranes. A second primary goal will be a systematic exploration of the chemistry and applications of the clusters which will be made available by the first part of the project. The polyhedral boranes are cage shaped molecules which possess unique chemical bonding and unusual properties. Besides being of theoretical interest, they are thought to be starting materials from which novel ceramics and polymers may be obtained. However, there are presently no good ways in which large quantities of the polyhedral boranes can be prepared in an economical fashion. The aim of this project is the development of new, efficient synthetic methods for the generation of these compounds. This will be accompanied by comprehensive investigations of the chemistry of the newly available molecules. These investigations will set the stage for the practical applications of polyhedral boranes as precursors to ceramic and polymeric materials.

Larry G.博士Sneddon，化学系，宾夕法尼亚大学，是由化学系的无机，生物无机和有机化学计划的支持，以开发新的通用方法，使系统，高产率制备多面体硼簇。本计画将设计各种多面体硼化合物的合成与改性的新方法。其中包括：涉及多面体硼阴离子对腈和极性乙炔的亲核攻击的新型碳和氮笼插入反应;多面体硼烷与乙炔、烯烃和/或一氧化碳的金属催化反应;以及导致硫杂和二硫杂硼烷的新型硫原子插入反应。第二个主要目标将是系统地探索该项目第一部分将提供的团簇的化学和应用。 多面体硼烷是笼形分子，具有独特的化学键和不寻常的性质。除了理论上的兴趣，它们被认为是可以获得新型陶瓷和聚合物的起始材料。然而，目前还没有可以以经济的方式制备大量多面体硼烷的好方法。该项目的目的是开发新的，有效的合成方法来产生这些化合物。这将伴随着对新可用分子的化学性质的全面调查。这些研究将为多面体硼烷作为陶瓷和聚合物材料前体的实际应用奠定基础。