Systematics of the Synthesis and Reactivity of Heteronuclear Cluster Compounds

在这个项目中，这是由无机，生物无机和有机化学计划，博士理查德D。南卡罗来纳州大学的亚当斯将继续他对异金属多核团簇的研究。 这些最近发现的化合物含有铂和钌或锇原子和羰基配体的三角形层。 初步结果表明，在与有机化合物的反应中金属的选择性。本研究的主要目标是开发制备这些新型金属簇合物的系统方法，并通过不同的金属层全面研究基质协调的选择性效应及其活化的协同性。 结合红外，多核NMR和单晶X-射线衍射加上反应性研究，包括动力学，将被用来探索这些新的簇化合物。 许多重要的工业多相催化剂含有多于一种类型的金属。 这些混合金属、异金属催化剂在其反应中比由单独金属产生的催化剂更有活性和/或选择性。 这种协同作用的原因尚不清楚。 本项目将利用新型异金属簇合物研究均相体系中的反应，这些反应可能与非均相情况有关。 所获得的信息可以允许更好地理解混合金属多相催化剂具有独特性能的原因，并最终用于新催化剂的合理设计。

In this project, which is supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program, Dr. Richard D. Adams of the University of South Carolina will continue his studies of heterometallic polynuclear clusters. These recently discovered compounds contain triangular layers of platinum and ruthenium or osmium atoms and carbonyl ligands. Preliminary results suggest metal selectivity in reactions with organic compounds. Major objectives of the research are the development of systematic methods for preparation of these novel metal clusters and a comprehensive investigation of selectivity effects in coordination of substrates, and cooperativity in their activation, by the different metal layers. A combination of infrared, polynuclear NMR and single crystal x-ray diffraction coupled with reactivity studies, including kinetics, will be used to explore these new cluster compounds. A number of significant industrial heterogeneous catalysts contain more than one type of metal. These mixed metal, heterometallic catalysts are more active and/or selective in their reactions than are catalysts generated from the individual metals. The reasons for this synergistic action are not well understood. This project will utilize novel heterometallic cluster compounds to investigate reactions in homogeneous systems that may then be related to heterogeneous situations. The information obtained may allow for the development of a better understanding of the reasons why mixed metal, heterogeneous catalysts have unique properties and ultimately for the rational design of new catalysts.