Expanding the Limits of the Coordination of Molecular Hydrogen

印第安纳大学布卢明顿分校化学系Kenneth G. Caulton博士受化学学部无机、生物无机和有机金属化学项目的支持，研究了氢配体的结构和功能，这些配体附着在催化活性的晚期过渡金属上。将发展形成含有氢化物和二氢配体的锇、铂和铑配合物的方法。配体结合和交换的动力学和热力学，以及这些分子内的磁交换机制将进行评估。将尝试将二氢配位扩展到新的金属和新的氧化态。这些研究的结果将用于设计新的催化剂，特别是烯烃水化催化剂。氢分子可能因金属原子的相互作用而活化。这一特性在实验室和工业化学中已被长期利用，以增加氢进行许多反应的能力。另一方面，随着人们对氢作为清洁燃料的兴趣的增加，氢与金属之间的相互作用已成为一个重要的话题。这个项目将评估氢附着在金属上的基本方式。利用这些数据，将设计出新的含氢化合物，并提出一种在工业上非常重要的向不饱和有机化合物加水的新方法。“烯烃水化”，将被开发。

9412830 Caulton Indiana Univ. - Bloomington Dr. Kenneth G. Caulton, Chemistry Department, University of Indiana at Bloomington, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division for an investigation of the structure and function of hydrogen ligands which are attached to catalytically active late transition metals. Methods of forming complexes of osmium, platinum, and rhodium which contain hydride and dihydrogen ligands will be developed. The kinetics and thermodynamics of ligand binding and exchange, and the mechanism of magnetic exchange within these molecules will be evaluated. Attempts will be made to extend dihydrogen coordination to new metals and to new oxidation states. The results of these studies will be utilized to design new catalysts for, in particular, olefin hydration. Hydrogen molecules may become activated by interacting metal atoms. This property has been exploited for a long time in both laboratory and industrial chemistry to increase the ability of hydrogen to undergo many reactions. In another respect, the interactions between hydrogen and metals has become an important topic with the increased interest in hydrogen as a clean fuel. This project will evaluate the fundamental ways in which hydrogen becomes attached to a metal. Using this data, new compounds containing hydrogen will be designed and a new method of performing the industrially very important addition of water to an unsaturated organic compound, i.e. "olefin hydration", will be developed.