New Organic Intermediates Containing Silicon or Tin

在这个有机动力学项目中，西北大学化学系的约瑟夫·B·兰伯特教授将研究“含硅或锡的新有机中间体”。他将探索元素与相邻正电荷之间的相互作用，以研究超共轭现象。将努力利用硅离子为碳-硅和硅-硅键的形成提供新的方法，并作为可能导致新材料的聚合反应的催化剂。含有硅、锡或其他主族元素的正电荷物种将被用来研究超共轭。锡和铅将被用来研究正电荷在许多西格玛键上的离域，以证明一种称为多阶段超共轭的新机制。我们将研究乙烯和饱和体系中超共轭的空间依赖性。将设计新的策略来获得具有更大离子活性和稳定性的硅离子、锗离子和磷离子。硅离子将被用来提供形成碳-硅和硅-硅键的新方法，并用作可能导致新材料的聚合反应的催化剂。锡稳定正电荷的特殊能力将被用来产生新的苯基和乙烯基阳离子。

In this project in the Organic Dynamics Program, Professor Joseph B. Lambert from the Chemistry Department at Northwestern University will study "New Organic Intermediates Containing Silicon or Tin". He will explore the interactions between the element and adjacent positive charge in order to study the phenomenon of hyperconjugation. Efforts will be made to use silylenium ions to provide new methods for carbon-silicon and silicon-silicon bond formation and to serve as catalysts for polymerization reactions that may lead to new materials. Positively charged species containing silicon, tin, or other Main Group elements will be used to study hyperconjugation. Tin and lead will be used to study delocalization of positive charge over many sigma bonds in order to prove a new mechanism called multiple stage hyperconjugation. The spatial dependence of hyperconjugation in vinyl and saturated systems will be studied. New strategies will be devised for obtaining silylenium, germylenium, and phosphenium ions with greater ionicity and stability. Silylenium ions will be used to provide new methods for carbon-silicon and silicon-silicon bond formation and to serve as catalysts for polymerization reactions that may lead to new materials. The exceptional ability of tin to stabilize positive charge will be used to create new phenyl and vinyl cations.