Metallaborane Chemistry: From Small Heterobimetallaboranes to Large Metallaheteroboranes

金属硼烷化学：从小杂双金属硼烷到大金属杂硼烷

• 批准号: 9727570
• 负责人: Lawrence Barton
• 金额: $ 22.3万
• 依托单位: University of Missouri-Saint Louis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-03-01 至 2002-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9727570&HistoricalAwards=false
• 关键词: Metallaborane; Chemistry; Small; Heterobimetallaboranes; Large

Dr. Lawrence Barton, Chemistry Department, University of Missouri-St. Louis, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division for research on metallaborane chemistry. Heterobimetallaboranes that are derived from polyhedral boranes by substituting two of the boron vertices by various metals will be synthesized. Early transition metals will be combined with late metals to obtain species with metals of different electronic configurations. Since early transition metal complexes are good polymerization catalysts, heterobimetallaboranes containing only these metals will be prepared and evaluated as borane oligomerization catalysts. The work will be extended to the incorporation of main group nonmetal atoms into a monometallaborane. Routes to large cage derivatives will be sought and the mechanisms of cluster substitution processes will be evaluated. Boranes form a series of compounds and ions with regular structures in which boron-hydrogen units define the vertices of polyhedra. The ability of boron to support these cage structures is unique. The object of this project is to substitute some of the vertices in such cages with non-boron atoms. Special emphasis will be placed on examples with two transition metals and ones with a transition metal and a main-group nonmetal atom. These species will be designed as possible catalysts and as probes to determine the details of how substitution occurs in the boranes. This latter objective is important to preparing new metallaboranes of specific shape and composition. In addition to the new chemistry that will be uncovered in this project, postdoctoral, graduate, and undergraduate students will be educated in the very precise experimental techniques required for the investigation of boron hydrides.

Lawrence Barton 博士，密苏里大学圣路易斯分校化学系 Louis，得到化学部无机、生物无机和有机金属化学项目的支持，进行金属硼烷化学研究。 将合成由多面体硼烷通过用各种金属取代其中两个硼顶点而衍生的杂双金属硼烷。早期过渡金属将与晚期金属结合以获得具有不同电子构型的金属的物质。 由于早期过渡金属配合物是良好的聚合催化剂，因此将制备仅包含这些金属的杂双金属硼烷并作为硼烷低聚催化剂进行评估。这项工作将扩展到将主族非金属原子并入单金属硼烷中。将寻找大型笼衍生物的路线，并评估簇替代过程的机制。 硼烷形成一系列具有规则结构的化合物和离子，其中硼-氢单元定义多面体的顶点。硼支撑这些笼状结构的能力是独一无二的。该项目的目标是用非硼原子替代此类笼子中的一些顶点。将特别强调具有两种过渡金属的示例以及具有过渡金属和主族非金属原子的示例。这些物质将被设计为可能的催化剂和探针，以确定硼烷中如何发生取代的细节。后一个目标对于制备特定形状和组成的新金属硼烷很重要。除了该项目中将发现的新化学之外，博士后、研究生和本科生还将接受氢化硼研究所需的非常精确的实验技术的教育。