Systematic Metallaborane Chemistry

圣母大学化学系Thomas P.Fehlner博士得到化学部无机、生物无机和有机金属计划的支持，以合成同时包含主基和过渡金属原子的新原子簇。该项目有几个目标。金属促进的单硼烷缩合反应将被开发为官能化的硼烷和碳硼烷的路线，这些配体将被用于制备金属-烯丙基配合物的类似物。在这方面，硼烷碎片将被用作复杂的辅助配体，并将评估其影响金属中心有机化学的能力。通过金属卤化物与一硼烷的反应合成了稀土-硼和过渡金属-铝的络合物。将研究这些物种与小分子的反应，其中一个目标是金属支持的由氢气驱动的B-H还原。过渡金属与含碳取代基结合时的化学是金属有机化学广阔领域的基础。这一领域的研究已经在理论化学和应用化学方面取得了许多进展。该项目旨在开辟一个过渡金属与含硼单元结合的相关领域。初步结果表明，这些“金属硼烷”将拥有广泛的化学，在某些方面类似于有机金属化学，但在其他方面却非常不同。在这项研究中，将制备新的硼烷和过渡金属的组合，并对它们的化学进行研究。这些新化合物将在新的反应化学中展示其电子结构的独特方面。

Dr. Thomas P. Fehlner, Department of Chemistry, University of Notre Dame, is supported by the Inorganic, Bioinorganic, and Organometallic Program of the Chemistry Division for the synthesis of new clusters containing both main-group and transition-metal atoms. The project has several goals. Metal facilitated monoborane condensation reactions will be developed as routes to functionalized boranes and carboranes and these ligands will be used to prepare analogs of metal-allyl complexes. In this regard the borane fragment will be used as a complex ancillary ligand and its ability to influence organic chemistry at the metal center will be evaluated. Lanthanide-boron and transition metal-aluminum complexes will be prepared by metal halide reactions with monoboranes. The reactions of these species with small molecules will be investigated, with one objective being metal supported B-H reductions driven by dihydrogen. The chemistry of the transition metals when combined with carbon containing substituents is the basis of the vast field of organometallic chemistry. Research in this area has led to many advances in pure and applied chemistry. This project aims to open a related area in which transition metals are combined with units containing boron. Preliminary results indicate that these "metallaboranes" will possess an extensive chemistry that in some ways resembles organometallic chemistry, but in other ways is very different. In this investigation new combinations of boranes and transition metals will be prepared and their chemistry investigated. The new compounds will express the unique aspects of their electronic structures in new kinds of reaction chemistry.