Metal Complexes with Sterically Hindered Tellurolate Ligands

在化学部无机、生物无机和有机金属计划的这个项目中，阿诺德将研究含有空间受阻的碲酸盐配体的金属络合物。这项研究的长期目标是通过与相关的烷氧化合物和硫酸盐的比较，更好地确定碲酸盐配体的配位化学，从而为设计各种潜在有用的固体材料的分子前驱体提供合理的基础。由于其新颖的化学、光学和电学性质，一系列含碲的金属化合物引起了人们的极大关注。然而，与与这些材料的固态性质有关的大量数据相比，我们对离散金属-碲键的化学知识仍然存在很大的差距。该项目概述了旨在通过研究含有有机碲配体的金属络合物来发展这种相互作用的一般化学的工作。这项工作的一个特别的重点是通过探索新的合成路线来更好地定义碲酸盐配体的配位化学，从而获得具有大量芳基、烷基、硅基和相关取代基的离散的单体碲酸盐物种。这种方法可以与相应的醇盐和硫酸盐的最新进展进行比较，在这些方法中，大量配体的使用导致了对金属-氧和金属-硫键性质的更详细的理解。由于已知的金属碲酸盐相对较少，这一化学将在主族和过渡元素的广泛范围内发展，以解决有关成键和反应性的具体问题。

In this project in the Inorganic, Bioinorganic, and Organo- metallic Program of the Chemistry Division, Arnold will study metal complexes containing sterically hindered tellurolate ligands. The long term goals of the research are to better define the coordination chemistry of tellurolate ligands via comparisons with related alkoxides and thiolates and, in doing so, to provide a rational basis for the design of molecular precursors to a variety of potentially useful solid-state materials. Considerable attention has been focused on a range of metal compounds incorporating tellurium due to their novel chemical, optical and electronic properties. In contrast to the large body of data pertaining to the solid-state properties of these materials, however, there continues to exist a large gap in our knowledge relating to the chemistry of discrete metal-tellurium bonds. This project outlines work aimed at developing the general chemistry of such interactions by studying metal complexes incorporating organotellurium ligands. A particular focus of the work is to better define the coordination chemistry of tellurolate ligands by probing new synthetic routes to discrete, monomeric tellurolate species with bulky aryl, alkyl, silyl and related substituents. This type of approach can be compared to recent advances in corresponding alkoxide and thiolates, where use of bulky ligands has resulted in a much more detailed understanding of the properties of metal-oxygen and metal-sulfur bonds. Since relatively few metal tellurolates are known, this chemistry will be developed across a broad spectrum of main group and transition elements in order to address specific questions regarding bonding and reactivity.