Organic and Organometallic Chemistry

该奖项在无机，生物无机和有机化学 项目为罗伯特博士的研究提供持续支持 G.伯格曼是密歇根大学化学系的教授， 加州伯克利分校在有机金属化学领域。 杂环化合物的合成和反应 由各种桥连的早-晚过渡金属 将研究群体。 其中一项调查涉及 可溶性亚甲基和亚烷基桥连化合物 钽和铂或钽的配体和金属中心 和钴，已经发现它们可以作为催化剂， 烯烃的氢化、异构化和硅氢化，如 以及一氧化碳和氢气的转化， 甲烷和甲醇和一氧化碳转化为 醋酸 这些催化过程的机制将 确定，特别是关于立体化学，和 测试其他金属组合的有效性。 %%% 该项目的目标是制定方法， 含两个跃迁新分子的系统合成 金属中心，并探索其反应的细节 与有机分子。 这两种金属将是早期的（例如， Zr或Ta）和晚期（例如，Ir或Co）过渡金属，和 会有不同的电子特性 它们连接 通过含有碳、氧、氮的桥连基团， 硫，它可以以新的方式与有机分子反应， 由于环境的影响， 的 这项研究的结果与反应有关， 复杂的多金属系统，如催化表面。

This award in the Inorganic, Bioinorganic, and Organometallic Program provides continued support for research by Dr. Robert G. Bergman of the Chemistry Department, University of California at Berkeley in the area of organometallic chemistry. Synthesis and reactions of heterobimetallic compounds composed of early-late transition metals linked by a variety of bridging groups will be studied. One of the investigations concerns soluble compounds with bridging methylene and alkylidene ligands and metals centers of tantalum and platinum or tantalum and cobalt, which have been found to act as catalysts for the hydrogenation, isomerization, and hydrosilation of alkenes, as well as for the coversion of carbon monoxide and hydrogen to methane and the conversion of methanol and carbon monoxide to acetic acid. The mechanism of these catalytic processes will be determined, particuarly with regard to stereochemistry, and the effectiveness of other combinations of metals tested. %%% The goal of the project is to develop methods for the systematic synthesis of new molecules containing two transition metal centers and to explore the details of their reactions with organic molecules. The two metals will be an early (e.g., Zr or Ta) and a late (e.g., Ir or Co) transition metal, and will have different electronic properties. They are connected by bridging groups containing carbon, oxygen, nitrogen, and sulfur, which can react with organic molecules in novel ways because of the influence of the bimetallic environment. The findings of this research are relevant to reactions in complicated multi-metal systems such as catalytic surfaces.