The Stereoselective Formation of trans-Cumulene through Dehalogenative Homocoupling of Alkenyl gem-Dibromides on Cu(110)

摘要

Stereoselective synthesis of geometrically pure isomers is challenging and important in a variety of chemistry related disciplines and applications. The recently developed on-surface synthesis strategy provides us opportunities in the fabrication of specific nanostructures which remain challenging by conventional solution chemistry. In this work, we choose alkenyl gem-dibromides as molecular precursors, and demonstrate the formation of specific trans-cumulene products via C-C couplings on Cu(110). This study supplements the database of on-surface synthesis strategies by introducing the alkenyl gem-dibromide group on the surface. More importantly, it provides a way to stereoselective synthesis of specific isomers involving C-C double bonds, which may be of substantial utility in stereochemistry.