Small to Gigantic Metal Clusters

小行星9310428 该奖项在无机，生物无机和有机化学 化学计划提供持续的支持，研究 过渡金属羰基簇合物，由Lawrence F. 达尔，哥伦比亚大学化学系， 威斯康星州麦迪逊。 一个主要目标是提供一个统一的 分子几何构型与电子 配置为各种金属簇，许多 在获得或失去电子的同时， 框架。 研究将集中在两个方面：1） 分离、结构测定和物理化学 高核度铂、镍和 混合金属羰基簇合物;和2）合成， 立体化学键分析和电化学反应性 富含电子的金属团簇 合理方法 制备大团簇和适当的分离技术 分离和结晶纯物质用于表征 仍有待开发。 除了确定 这些配合物的结构，它们的磁性和 将研究一氧化碳吸附的模式。 的 金属簇与主族试剂的反应性， 也许能够稳定物种，也将进行研究。 将尝试分离金属磷化物和金属 具有新颖键合特征的砷簇。 %大金属簇，可使用标准 化学方法可能是了解 固体金属表面或晶格碎片的行为， 常用于催化。 特别感兴趣的是 反应特性和电子特性。 工作 可产生有效作为催化剂的材料或 反应条件或表面制备的改进 目前工业上使用的催化材料。 ***

9310428 Dahl This award in the Inorganic, Bioinorganic, and Organometallic Chemistry Program provides continued support for research on transition metal carbonyl cluster compounds by Dr. Lawrence F. Dahl of the Chemistry Department, University of Wisconsin-Madison. A major goal is to provide a unified correlation between molecular geometries and electronic configuration for various kinds of metal clusters, many of which gain or lose electrons without rupture of their atomic frameworks. Research will be focused in two areas: 1) isolation, structural determination, and physical-chemical characterization of high nuclearity platinum, nickel, and mixed-metal carbonyl clusters; and 2) synthesis, stereochemical-bonding analysis, and electrochemical reactivity of small electron-rich metal clusters. Rational methods for preparing large clusters and appropriate separation techniques to isolate and crystallize pure species for characterization remain to be developed. In addition to determining the structure of these complexes, their magnetic properties and modes of carbon monoxide adsoption will be investigated. The reactivity of metal clusters with main group reagents, which may be able to stabilize the species, will also be studied. Attempts will be made to isolate metal phosphide and metal arsenic clusters with novel bonding features. %%% Large metal clusters that can be characterized using standard chemical methods may be useful models for understanding the behavior of solid metal surfaces or lattice fragments, which are often used in catalysis. Of particular interest are reactivity characteristics and electronic features. The work may result in materials that are effective as catalysts or in the improvement of reaction conditions or surface preparation of catalytic materials currently in industrial use. ***