Transition Metal Promoted Reactions of Boron Hydrides

过渡金属促进氢化硼的反应

• 批准号: 8703454
• 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: 1987
• 资助国家: 美国
• 起止时间: 1987-05-01 至 1990-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8703454&HistoricalAwards=false
• 关键词: Transition; Metal; Promoted; Reactions; Boron

Boron hydride compounds with cage-like structures are of considerable interest to inorganic chemists because of the unusual chemical bonds which hold them together. These cage compounds and derivatives thereof prepared by the addition of metals or carbon also show promise as precursors for the preparation of a wide variety of new materials, such as thin films and ceramics. Unfortunately, these compounds have been extremely expensive due to the lack of efficient methods of preparation. A major goal of this project is to use metal catalysts in more efficient syntheses of these important compounds. The major focus of this project is the development of new, high yield synthetic routes for the construction of important polyhedral boron compounds. Owing to their unique chemical and physical properties, these types of compounds have been of great academic and industrial interest; however, further research in the area has been seriously inhibited by the lack of general synthetic procedures. In this laboratory the approach to this problem has emphasized the development of transition metal catalysts, similar to those which are now widely employed in organic and organometallic chemistry, to activate polyhedral boron compounds for reaction. Previous work from this laboratory demonstrated that these catalysts can be used to promote a variety of transformations involving boron hydrides and carboranes, including: borane-acetylene additions, borane-olefin coupling, dehydroalkyne insertions, dehydrocondensations and cage-growth reactions. Future work will continue investigations of the scope and mechanisms of these reactions, along with explorations of new types of catalytic reactions.

笼状结构的硼氢化物是一类重要的有机化合物， 无机化学家的兴趣，因为不寻常的化学键 将它们连接在一起 这些笼状化合物和衍生物 通过添加金属或碳制备的其也显示出希望， 作为制备各种新材料的前体， 例如薄膜和陶瓷。 不幸的是，这些化合物 由于缺乏有效的方法， 准备. 该项目的一个主要目标是使用金属催化剂 更有效地合成这些重要的化合物。 该项目的主要重点是开发新的高产 重要多面体硼的合成路线 化合物. 由于其独特的化学和物理性质， 这些类型的化合物具有很大的学术和工业价值， 然而，在该领域的进一步研究已经严重 由于缺乏一般的合成程序而受到抑制。 在这 实验室解决这个问题的方法强调了发展 过渡金属催化剂，类似于现在广泛使用的那些 用于有机和有机金属化学，以激活 多面体硼化合物反应。 以前的工作从这个 实验室证明，这些催化剂可用于促进 涉及硼氢化物和碳硼烷的各种转化， 包括：硼烷-乙炔加成，硼烷-烯烃偶联， 脱氢炔插入、脱氢缩合和笼状生长 反应. 今后的工作将继续调查的范围和 这些反应的机制，沿着探索新的类型， 催化反应