Transition Metal Complexes with Crown Thioether Ligands

该奖项在无机，生物无机和有机化学 该计划支持格雷戈里·J·格兰特博士的一个联合项目， 美国田纳西大学查塔努加分校化学系 和威廉·塞泽尔博士，化学系，大学 在亨茨维尔的亚拉巴马。 新中型环状三齿 和大环六齿聚硫醚， 用于结合多种二价和三价金属离子， 包括Pt（II）、Pd（II）、Hg（II）、Cd（II）、Re（III）、V（II）， Cr（II）和二价镧系元素。 的有机金属化合物 Rh将被合成并测试为立体特异性的 加氢催化剂 预计这些化合物将表现出 不寻常的属性，由于强加的结构限制， 对金属离子显示出不同的亲和力。 %%% 含有硫的大环状有机分子可以结合到 金属离子通过硫原子。 当分子 本研究选择了三个或六个硫原子， 对于这样的结合，金属可以被捕获在大的 有机结构 根据戒指的大小， 硫原子的数量和取向，以及性质 对于特定的金属离子，金属离子在它们的倾向性方面不同， 被困在这些分子中 这项研究将 制备新的环状化合物，并检查 它们形成的金属络合物。 该项目有可能 对于开发重金属提取方法很重要， 生物无机化学和催化。

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.