Non-Covalent Dimerization after Enediyne Cyclization on Au(111)

Kavli Affiliate: Michael F. Crommie

| First 5 Authors: Dimas G. de Oteyza, Alejandro PĂ©rez Paz, Yen-Chia Chen, Zahra Pedramrazi, Alexander Riss

| Summary:

We investigate the thermally-induced cyclization of 1,2 – bis(2 –
phenylethynyl)benzene on Au(111) using scanning tunneling microscopy and
computer simulations. Cyclization of sterically hindered enediynes is known to
proceed via two competing mechanisms in solution: a classic C1 – C6 or a C1 –
C5 cyclization pathway. On Au(111) we find that the C1 – C5 cyclization is
suppressed and that the C1 – C6 cyclization yields a highly strained bicyclic
olefin whose surface chemistry was hitherto unknown. The C1 – C6 product
self-assembles into discrete non-covalently bound dimers on the surface. The
reaction mechanism and driving forces behind non-covalent association are
discussed in light of density functional theory calculations.

| Search Query: ArXiv Query: search_query=au:”Michael F. Crommie”&id_list=&start=0&max_results=10

Read More

Leave a Reply