Gallepins: A Metalloaromatic Excursion

Gregory H. Robinson博士，乔治亚大学化学系，由化学系无机、生物无机和有机金属化学项目支持，负责gallenpins的合成和研究。Gallenpins是一种七元环化合物，通过镓取代一个环碳而与tropylium离子相关。这些物质含有6个pi电子，是中性芳香化合物。环闭合反应将用于制备多种gallepin分子，包括简单gallepin、苯并加脂素、二苯并加脂素、非芳香annelated gallepin和引信环gallepin。这些分子的反应化学将被检查，以确定是否有可能稳定两个gallepin之间的Ga-Ga键，gallepin环的金属芳香族特征是否影响这种Ga-Ga键，gallepin环的金属芳香族特征与镓-过渡金属键的化学之间是否存在相关性，以及是否有可能合成双(gallepin)-过渡金属夹层化合物。芳香性是解释含离域电子的环状有机化合物的化学性质的最重要的概念之一。该项目旨在制备含有主族金属镓的芳香化合物，并将芳香性的概念扩展到碳的范围之外，使金属发挥更突出的作用。本项目招收本科生、研究生和博士后。他们将发展各种合成和物理方法的技能。这些学生将包括代表性不足的群体的成员。

Dr. Gregory H. Robinson, Chemistry Department, University of Georgia, is supported by the Inorganic, Bioinorganic, and Organometallic Chemistry Program of the Chemistry Division for the synthesis and study of gallenpins. Gallenpins are seven member cyclic compounds related to tropylium ions by the replacement of one ring carbon by a gallium. These species will contain 6 pi-electrons and be neutral aromatic compounds. Ring closure reactions will be used to prepare a variety of gallepin molecules, including simple gallepins, benzogallepins, dibenzogallepins, non-aromatic annelated gallepins, and fuzed ring gallepins. The reaction chemistry of these molecules will be examined in order to determine if it is possible to stabilize a Ga-Ga bond between two gallepins, if the metalloaromatic character of gallepin rings affects such Ga-Ga bonds, if there is a correlation between metalloaromatic character of the gallepin ring and the chemistry ofgallium-transition metal bonds, and if it is possible to synthesize bis(gallepin)-transition metal sandwich compounds. Aromaticity is one of the most important concepts in explaining the chemistry of cyclic organic compounds that contain delocalized pi electrons. This project aims at preparing aromatic compounds that contain the main group metal, gallium, and to extend the concept of aromaticity beyond the confines of carbon to a region where metals play a more prominent role. Undergraduate, graduate, and postdoctoral students will be engaged in this project. They will develop skills in a wide range of synthetic and physical methods. These students will include members of underrepresented groups.