Structures and Reactions of New Main-Group Organometallic Compounds

新型主族有机金属化合物的结构与反应

• 批准号: 8700682
• 负责人: Herman Richey
• 金额: $ 20.25万
• 依托单位: Pennsylvania State Univ University Park
• 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: 1987-05-15 至 1990-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8700682&HistoricalAwards=false
• 关键词: Structures; Reactions; New; Main; Group

This grant is in the Organic and Macromolecular Chemistry Program. In this study the influence of the addition of highly reactive lithium or alkali metal salts of organic hydrocarbon anions to a series of standard organomagnesium reagents will be investigated. As these chemical species equilibrate, a new negatively charged carbanion is formed that exhibits greatly enhanced chemical reactivity. This dynamic equilibrium can also be favorably altered by the addition of crown ethers or complexing agents the sequester the positively charged metal ions resulting in markedly different chemical bahavior. Specifically, the proposed research is concerned with preparations, structures, and reactions of new organometallic species of main-group metals. A major portion of the research will concern magnesiate ions. These negative organomagnesium ions will be synthesized from ordinary organic compounds in a number of ways compounds, including addition of coordinating agents, such as crown ethers and cryptands, or simple salts, such as alkali metal alkoxides and tetraalkylammonium halides. Structures and reactions of magnesiate species will be investigated. Magnesiate ions generally are considerably more reactive than conventional organomagnesium compounds and with some substrates furnish different products. Other organomagnesium species to be synthesized and studied structurally include organomagnesium cations (RMg+) and diorganomagnesium compounds (R2Mg) that are stabilized by coordinating groups such as crown ethers. A portion of the proposed work also will involve preparation of new organometallic species of other metals, particularly species formed from organoaluminum or organozinc compounds with crown ethers.

这笔赠款属于有机和高分子化学项目。 在本研究中，将研究添加高反应性锂盐或有机烃阴离子的碱金属盐对一系列标准有机镁试剂的影响。 当这些化学物质达到平衡时，会形成一种新的带负电的碳负离子，其化学反应活性大大增强。 这种动态平衡也可以通过添加冠醚或络合剂来有利地改变，螯合带正电的金属离子，从而产生明显不同的化学行为。 具体来说，拟议的研究涉及主族金属新有机金属物种的制备、结构和反应。 该研究的主要部分将涉及镁离子。 这些负有机镁离子可以通过多种方式由普通有机化合物合成化合物，包括添加配位剂，例如冠醚和穴状配体，或简单盐，例如碱金属醇盐和四烷基卤化铵。 将研究镁酸盐的结构和反应。 镁离子通常比传统的有机镁化合物更具反应性，并且与某些底物一起提供不同的产物。 其他待合成和结构研究的有机镁物种包括有机镁阳离子（RMg+）和二有机镁化合物（R2Mg），它们通过冠醚等配位基团稳定。 拟议工作的一部分还将涉及制备其他金属的新有机金属物质，特别是由有机铝或有机锌化合物与冠醚形成的物质。