Fundamental Aspects of the Dinuclear Chemistry of Molybdenumand Tungsten

钼和钨的双核化学的基本方面

基本信息

批准号：
9101664
负责人：
Malcolm Chisholm
金额：
$ 44.98万
依托单位：
Indiana University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1991
资助国家：
美国
起止时间：
1991-05-15 至 1994-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9101664&HistoricalAwards=false
关键词：
Fundamental Aspects Dinuclear Chemistry Molybdenumand

项目摘要

The coordination chemistry of dinuclear cationic transition metal complexes of molybdenum and tungsten with formal charges of four to ten will be explored through synthesis and structural methods. Kinetic and mechanistic studies of ligand substitution reactions and the organometallic chemistry of dinuclear metal centers will be initiated. These results may differ substantially from the thoroughly investigated mononuclear complexes due to the influence of the metal-metal bond. Ordered assemblies such as liquid crystals and polymers formed by use of dinuclear metal multiple bonds as building blocks will be investigated, with emphasis on the controllable magnetic, optical, and electronic properties of these macromolecular systems. The dinuclear precursors have first ionization potentials that vary by two volts depending on metal and the substituents; these features should allow a large array of macromolecular systems with tunable electronic properties. %%% In this project in the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division, Dr. Malcolm H. Chisholm of Indiana University will continue his studies of the rich chemistry of dinuclear complexes of molybdenum and tungsten. These molecules show considerable promise as homogeneous catalysts. In addition, they can be assembled under proper conditions to form liquid crystals and polymers that may have useful properties as new materials.

将通过合成和结构方法探索钼和钨具有四到十个正式电荷的钼和钨的二核阳离子过渡金属复合物的配位化学。配体替代反应的动力学和机理研究将开始启动双核金属中心的有机金属化学。由于金属金属键的影响，这些结果可能与彻底研究的单核复合物有很大不同。将研究通过使用双核金属多键作为构建块形成的有序组件，例如液晶和聚合物，重点是这些大分子系统的可控磁，光学和电子性能。二核前体具有首先电离电位，取决于金属和取代基的不同。这些功能应允许大量具有可调电子特性的大分子系统。印第安纳大学的化学部无机，生物有机和有机金属计划的该项目中的%%％，印第安纳大学的Malcolm H. Chisholm博士将继续研究他对钼和钨的丰富化学化学研究。这些分子作为均质催化剂表现出巨大的希望。另外，它们可以在适当条件下组装，形成可能具有有用特性作为新材料的液晶和聚合物。