The Singlet Diradical Character of Multiple Bonded Compounds of the Heavier Group 13 and 14 Elements

重13族和14族元素多重键合化合物的单线态双自由基特征

• 批准号: 0641020
• 负责人: Philip Power
• 金额: $ 49.5万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-02-01 至 2011-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0641020&HistoricalAwards=false
• 关键词: Singlet; Diradical; Character; Multiple; Bonded

Dr. Phillip Power, Chemistry Department, University of California - Davis, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program to explore the singlet diradical character of multiple bonded heavier main group compounds of the type RMMR (M = Al-Tl or Si-Pb). A range of new electronically modified terphenyl, amide, phosphide, aryloxide and thiolate ligands will be prepared and used to form RMMR and heteroelement RMM'R' complexes. The chemistry of these species will be investigated with a variety of reagents in order to determine if diradical behavior is encountered. In addition, the new compounds will be characterized by a variety of techniques including X-ray crystallography, solution and solid state heteronuclear NMR spectroscopy, Moessbauer spectroscopy, electrochemical and computational studies. These results will be used to correlate bonding and electronic changes that are difficult to describe in traditional terms of valency, orbital overlap, hybridization and bond order.This research will advance the fundamental understanding of the bonding of the heavier main group elements. Multiple bonds play an exceedingly important role in the chemistry of, e.g., carbon. However, heavier cogeners do not easily form multiple bonds. This project is aimed at investigating the nature and chemical properties of multiple bonds of such elements as silicon, germanium, tin, and lead. Graduate students, undergraduate students and postdoctoral associates will receive excellent training and research experiences in a forefront synthetic inorganic chemistry program.

加州-戴维斯大学化学系的菲利普·鲍尔博士得到了无机、生物无机和有机化学项目的支持，以探索RMMR类型的多键重主族化合物（M = Al-Tl或Si-Pb）的单线态双自由基特征。一系列新的电子改性的三联苯，酰胺，磷化物，芳氧基和硫醇配体将被制备和用于形成RMMR和杂元素RMM 'R'配合物。将使用各种试剂研究这些物质的化学性质，以确定是否遇到双自由基行为。此外，新化合物将通过各种技术进行表征，包括X射线晶体学，溶液和固态异相NMR光谱，穆斯堡尔光谱，电化学和计算研究。这些结果将被用来关联成键和电子的变化，这些变化是很难在传统的条件下描述的价，轨道重叠，杂化和键级。这项研究将推进更重的主族元素的成键的基本理解。多重键在化学中起着极其重要的作用，例如，carbon.然而，较重的同源物不容易形成多重键。本项目旨在研究硅、锗、锡和铅等元素的多重键的性质和化学性质。 研究生、本科生和博士后研究员将在前沿合成无机化学项目中获得出色的培训和研究经验。