Low-coordinate and Multiply-bonded Compounds of Silicon, Germanium and Tin

硅、锗、锡的低配位多重键化合物

• 批准号: 0451536
• 负责人: Robert West
• 金额: --
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-06-01 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0451536&HistoricalAwards=false
• 关键词: Low; coordinate; Multiply; bonded; Compounds

This project addresses the fundamental chemistry of unusual heavy-metal congeners of carbon compounds. Metallole dianions - five-membered ring compounds containing silicon, germanium or tin atoms - bear two negative charges which are delocalized over the rings. Reactions of these unique dianions are expected to give rise to a wide range of novel compounds containing metal-to-carbon double bonds, as well as to a remarkable series of stable diradicals, containing two unpaired electrons. The synthesis and chemistry of stable silylenes - compounds of silicon in the unusual oxidation state of 2 rather than the customary 4 - will also be explored. The process by which some stable silylenes serve as catalysts for the polymerization of unsaturated organic compounds will be investigated.With this award, the Organic and Macromolecular Chemistry Program is supporting the research of Professor Robert West, of the Department of Chemistry at the University of Wisconsin - Madison. Although our understanding of the chemistry of compounds containing carbon has become quite sophisticated, the chemistry of carbon's closely related relatives, silicon and germanium, is comparatively undeveloped. Professor West is studying the synthesis and reaction chemistry of a series of compounds in which one or more carbon atoms are replaced by silicon, germanium or tin. These studies are of fundamental importance in developing our understanding of the chemistry of the other elements in the periodic table. In addition, the unusual structures of Professor West's target compounds promise potential advances in practical reaction chemistry, including polymerization reactions.

该项目致力于碳化合物的不寻常重金属同系物的基础化学。金属二价阴离子-含有硅、锗或锡原子的五元环化合物-带有两个负电荷，它们在环上离域。这些独特的二价阴离子的反应，预计会产生一个新的化合物，含有金属碳双键，以及一个显着的一系列稳定的双自由基，含有两个不成对的电子。稳定的亚甲硅烷基的合成和化学-硅的化合物在不寻常的氧化态2，而不是习惯的4 -也将进行探讨。将研究一些稳定的亚甲硅烷基作为不饱和有机化合物聚合催化剂的过程。凭借该奖项，有机和大分子化学项目支持了威斯康星州大学化学系罗伯特·韦斯特教授的研究-麦迪逊。虽然我们对含碳化合物的化学性质的理解已经相当复杂，但碳的近亲硅和锗的化学性质相对来说还不发达。韦斯特教授正在研究一系列化合物的合成和反应化学，其中一个或多个碳原子被硅、锗或锡取代。这些研究对于我们理解周期表中其他元素的化学性质具有根本的重要性。此外，韦斯特教授的目标化合物的不寻常结构预示着实际反应化学的潜在进展，包括聚合反应。