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

9409123海岸俄亥俄州州立大学化学系谢尔顿海岸博士由无机，生物无机和有机化学计划支持，旨在扩大和开发制备和研究有机金属过渡金属簇合物体系的途径。衍生自钌和锇羰基簇的化合物，其中硼被结合在簇顶点或包封在金属核内，将通过硼烷与羰基或羰基化金属簇的反应来合成。羰基化物阴离子将进一步用硼烷还原，希望得到具有多个亚甲基桥的物种，并将探索与一氧化碳和氢气的反应。钌和锇羰基化合物与镧系金属的还原将用于制备梯形聚合物，其中镧系/过渡金属链通过羰基键连接。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连基团，如氰化物。这些梯形聚合物将负载在羟基化氧化镁上，并转化为纳米颗粒，用作催化剂和表面反应的研究。 含金属的小颗粒在催化的各个领域和作为电子器件中得到应用。该项目旨在制备由过渡金属（如钌或锇）和硼原子组成的小“簇”，或由过渡金属和镧系金属组成的更大的片状阵列。这些将被转化为“纳米颗粒”，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.