New Synthetic Approaches in Boron Chemistry

无机化学、生物无机化学和金属有机化学计划中的这个项目是在主族化学的一般领域和在氢化硼化学的特定领域。硼氢化合物作为合成新材料或改进已知材料合成的起始原料，如金属硼化物，具有相当大的实用价值。该项目的目标是开发新的合成策略，以促进硼氢化物化学中的高产率选择性转化。特别令人感兴趣的是使用过渡金属催化多面体硼烷和碳硼烷的转化。我们将研究如何使用Ru-羰基化合物来催化多面体碳硼烷中的炔烃插入反应。金属催化的烯烃和烯烃的加成和偶联反应将用于合成烯基和烷基硼烷。后过渡元素将被用作碳硼烷笼异构化的催化剂。过渡金属，特别是铂(II)，也将被用作硼烷的脱氢偶联、缩合、环合和笼状生长反应的催化剂。在第二个重大子项目中，将研究杂化多面体硼烷的合成以及化学和结构性质，例如亚硫代二硫硼烷簇合物。

This project in the Inorganic, Bioinorganic and Organometallic Chemistry Program is in the general area of main-group chemistry and in the specific area of boron hydride chemistry. Boron-hydrogen compounds are of considerable practical interest as starting materials for the synthesis of new materials or for improved syntheses of known materials, such as metal borides. The goal of this project is to develop new synthetic strategies to facilitate high yield selective transformations in boron hydride chemistry. Of especial interest is the use of transition metals to catalyze transformations of polyhedral boranes and carboranes. The use of ruthenium carbonyl compounds to catalyze the insertion of alkynes into polyhedral carboranes will be investigated. Metal-catalyzed alkyne and olefin addition and coupling reactions will be used for the synthesis of alkenyl- and alkyl-boranes. Late transition elements will be investigated as catalysts for isomerizations of carborane cages. Transition metals, particularly Pt(II), will be investigated also as catalysts for dehydro-coupling, -condensation, -cyclization and -cage growth reactions of boranes. In a second major sub-project the syntheses and chemical and structural properties of hybrid polyhedral boranes, such as hypho-dithiaborane clusters, will be investigated.