Skip to main content
eScholarship
Open Access Publications from the University of California

Noncovalent Dimerization after Enediyne Cyclization on Au(111).

  • Author(s): de Oteyza, Dimas G
  • Pérez Paz, Alejandro
  • Chen, Yen-Chia
  • Pedramrazi, Zahra
  • Riss, Alexander
  • Wickenburg, Sebastian
  • Tsai, Hsin-Zon
  • Fischer, Felix R
  • Crommie, Michael F
  • Rubio, Angel
  • et al.
Abstract

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 C(1)-C(6) (Bergman) or a C(1)-C(5) cyclization pathway. On Au(111), we find that the C(1)-C(5) cyclization is suppressed and that the C(1)-C(6) cyclization yields a highly strained bicyclic olefin whose surface chemistry was hitherto unknown. The C(1)-C(6) product self-assembles into discrete noncovalently bound dimers on the surface. The reaction mechanism and driving forces behind noncovalent association are discussed in light of density functional theory calculations.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
Current View