Mechanism of Transition Metal-Catalyzed Reactions in Hydrocarbons

本研究的重点有三个方面。首先，Ru烯烃歧化催化剂的活性将被确定为配体组成和金属含量的函数。其次，随着Ru络合物的发展，化学将扩展到铁和Re，以确定这些金属的络合物是否也形成金属-碳双键，并因此起到复分解催化剂的作用。第三，作为应变烯烃活性聚合引发剂的Ru络合物的活性将在包括水溶液和载体表面在内的特殊介质中进行检测。参与拟议研究的研究生将在有机金属和聚合物化学领域接受广泛的跨学科培训。有机和高分子化学计划(CHE)和固态化学和聚合物计划(DMR)支持加州理工学院化学系罗伯特·格拉布斯教授的研究。格拉布斯教授将专注于能够形成碳-金属双键的金属络合物的合成，以及将这些络合物用作聚合反应的引发剂。本课程将探讨在特殊环境中，包括水溶液和载体表面，特殊形状和组成的聚合物的形成和引发。格拉布斯教授将在有机金属络合物的设计、合成和表征以及它们作为聚合引发剂的用途方面培训研究生。

The focus of this research is threefold. First, the activity of ruthenium olefin-metathesis catalysts will be determined as functions of ligand composition and metal content. Second, the chemistry developed with the ruthenium complexes will be extended to iron and rhenium to determine whether complexes of these metals also form metal-carbon double bonds, and as such, function as metathesis catalysts. Third, the activity of the ruthenium complexes as initiators for the living polymerization of strained olefins will be examined in unusual media including aqueous solution and on the surface of a support. Graduate students involved in the proposed research will receive broad, interdisciplinary training in the areas of organometallic and polymer chemistry. The Organic and Macromolecular Chemistry Program (CHE) and the Solid State Chemistry and Polymer Program (DMR) support the research of Professor Robert Grubbs of the Department of Chemistry at the California Institute of Technology. Professor Grubbs will focus his research on the synthesis of metal complexes capable of forming carbon-metal double bonds, and the use of these complexes as initiators of polymerization reactions. Formation of polymers of unusual shape and composition and initiation in unusual environments, including aqueous solution and on the surface of a support, will be explored. Professor Grubbs will train graduate students in the design, synthesis and characterization of organometallic complexes and their use as polymerization initiators.