Transition Metal Complexes with Crown Thioether Ligands

无机、生物无机和有机金属项目的这一奖项支持田纳西大学查塔努加分校化学系的Gregory J.Grant博士和阿拉巴马大学亨茨维尔分校化学系的William Setzer博士的联合项目。新的中环三齿和大环六齿多硫醚将被用来结合各种二价和三价金属离子，包括铂(II)、钯(II)、汞(II)、镉(II)、Re(III)、V(II)、Cr(II)和二价稀土。Rh的有机金属化合物将被合成并作为立体定向加氢催化剂进行测试。由于施加的结构限制，这些化合物有望表现出不同寻常的性质，并对金属离子表现出不同的亲和力。%含硫的大环状有机分子可以通过硫原子与金属离子结合。当在本研究中选择的分子中，有三到六个硫原子可用于这种成键时，金属可以被困在一个大的有机结构中。根据环的大小、硫原子的数量和取向以及特定金属离子的性质，金属离子保持在这些分子中的倾向不同。这项研究将制备新的环状化合物，并检测它们形成的金属络合物的性质。该项目对开发重金属提取、生物无机化学和催化方法具有潜在的重要意义。

This award in the Inorganic, Bioinorganic, and Organometallic Program supports a joint project by Dr. Gregory J. Grant of the Chemistry Department, University of Tennessee at Chattanooga and Dr. William Setzer of the Chemistry Department, University of Alabama at Huntsville. New medium-sized cyclic tridentate and macrocyclic hexadentate polythioethers will be prepared and used to bind a variety of divalent and trivalent metal ions, including Pt(II), Pd(II), Hg(II), Cd(II), Re(III), V(II), Cr(II), and divalent lanthanides. Organometallic compounds of Rh will be synthesized and tested as stereospecific hydrogenation catalysts. The compounds are expected to exhibit unusual properties due to imposed structural constraints and to display differential affinities for metal ions. %%% Large cyclic organic molecules containing sulfur can bind to metal ions via the sulfur atoms. When, as in the molecules chosen for this study, three or six sulfur atoms are available for such bonding, the metal can be trapped inside a large organic structure. Depending on the size of the ring, the number and orientation of the sulfur atoms, and the properties of a particular metal ion, metal ions differ in their tendancy to remain trapped in these molecules. This research will prepare new cyclic compounds and examine the properties of the metal complexes they form. The project is potentially important to developing methods of heavy metal extraction, bioinorganic chemistry, and catalysis.