Synthesis and Studies of Selected Clusters Derived from Metal Carbonyls Reacting With Lanthanide Metals and With Borane Reagents

9409123 Shore俄亥俄州立大学化学系Sheldon Shore博士，由无机、生物无机和有机金属化学项目资助，研究旨在扩展和开发有机金属过渡金属簇系统的制备和研究途径。由钌和锇羰基团簇衍生的化合物，其中硼在团簇顶点或包裹在金属核心内，将通过硼烷与羰基或羰基金属团簇反应合成。羰基阴离子将与硼烷进一步还原，希望得到具有多个亚甲基桥的物质，并将探索与一氧化碳和氢的反应。镧系金属还原钌和锇羰基将用于制备梯状聚合物，其中镧系/过渡金属链由羰基键连接。随着合成策略的发展，这项工作将扩展到各种过渡金属和替代桥接基团，如氰化物。这些阶梯聚合物将被装载在羟基氧化镁上，转化为双金属纳米颗粒，用作催化剂和表面反应的研究。含金属的小颗粒在催化和电子器件的各个领域得到了应用。该项目旨在制备由过渡金属（如钌或锇）和硼原子或更广泛的片状过渡金属和镧系金属阵列组成的小“簇”。这些将转化为“纳米粒子”，并将对其化学和催化性能进行表征和评估。

9409123 Shore Ohio State Univ. Dr. Sheldon Shore, Chemistry Department, Ohio State University, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program for research designed to expand and develop avenues for the preparation and study of organometallic transition metal cluster systems. Compounds derived from ruthenium and osmium carbonyl clusters in which a boron is either incorporated at a cluster vertex or encapsulated within the metal core will be synthesized by reactions of borane with carbonyl or carbonylate metal clusters. The carbonylate anions will be further reduced with borane in hopes of obtaining species with multiple methylene bridges and reactions with carbon monoxide and hydrogen will be explored. The reduction of the ruthenium and osmium carbonyls with lanthanide metals will be used to prepare ladder polymers in which lanthanide/transition metal chains are joined by carbonyl linkages. With the development of the synthetic strategy, this work will be extended to a variety of transition metals and to alternative bridging groups such as cyanide. These ladder polymers will be loaded on hydroxylated magnesia and converted into bimetallic nanoparticles for use as catalysts and for studies of surface reactions. Small metal containing particles are finding application in various areas of catalysis and as electronic devices. This project is aimed at preparing small "clusters" which are composed of a transition metal, such as ruthenium or osmium, and a boron atom or a more extended, sheet-like array of transition and lanthanide metals. These will be converted into "nanoparticles" which will be characterized and evaluated for their chemical and catalytic properties.