Control of Reactivity and Regioselectivity for On-Surface Dehydrogenative Aryl–Aryl Bond Formation

摘要: Regioselectivity is of fundamental importance in chemical synthesis. Although many concepts for site-selective reactions are well established solution chemistry, it not a priori clear whether they can easily be transferred to taking place on metal surface. A will fix the potential electrons and perturb electronic states reactants because hybridization. Additionally, techniques characterize generally applicable on-surface reactions. Only recent developments resolving structures by atomic force microscopy (AFM) scanning tunneling (STM) paved way identifying individual reaction products surfaces. Here we exploit combined STM/AFM technique demonstrate formation complex molecular architectures built up from heteroaromatic precursor, tetracyclic pyrazino[2,3-f][4,7]phenanthroline (pap) molecule. Selective intermolecular aryl–aryl coupling via dehy...