Novel Reagents, Polymerization Initiators and Superbases--Advances in the Organometallic Chemistry of the Heavy Alkaline Earth Metals

雪城大学化学系的Karin Ruhlandt-Senger得到了无机化学、生物无机化学和有机金属化学计划的支持，致力于研究钙、锶和钡的分子化学以及与三价稀土元素的相关研究。将开发基于金属的方法，包括烷基/芳烃消除、脱硅和转金属反应，以方便地合成Sigma键合的碱土烷基、芳基和硫代酸盐。作为这项工作的一部分，新的配体，如三苯基，将被用来支持含有第二族金属的新型有机金属化合物。含有有机碱土或稀土阳离子的化合物将被制备并作为活性阴离子或开环聚合的引发剂。对这些碱土化合物的成键和反应活性的基础研究将有助于加深对这些相对未被探索的金属的有机金属化学的理解。此外，参与这项工作的本科生和研究生将通过研究这些活性物种，学习合成、表征和催化方面的宝贵技能。

Karin Ruhlandt-Senge, Department of Chemistry, Syracuse University, is supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program for research into the molecular chemistry of calcium, strontium and barium and related studies with the trivalent lanthanides. Metal-based methods, alkyl/arene elimination, desilylation, and transmetallations will be developed for the facile synthesis of sigma-bonded alkaline earth alkyls, aryls and thiolates. As a part of this effort, new ligands, such as terphenyls, will be utilized to support novel organometallic compounds containing group II metals. Compounds containing an organo alkaline earth or lanthanide cations will be prepared and evaluated as initiators in living anionic or ring opening polymerization.Fundamental studies of bonding and reactivity of these alkaline earth compounds will lead to an increased understanding of the organometallic chemistry of these relatively unexplored metals. In addition, undergraduate and graduate students involved in the work will learn valuable skills in synthesis, characterization and catalysis by studying these reactive species.