DISTINCT DEMONSTRATION OF METHYLENE INSERTION INTO THE METAL-CARBON BOND ON AG(111)

We provide a clear demonstration of the migratory insertion of methyle ne into the metal-carbon bond on a silver single-crystal surface. The insertion reaction is characterized by the interaction between methyle ne and perfluoromethyl groups coadsorbed on Ag(111). The CH2 insertion into the Ag-CF3 bond followed by P-fluoride elimination produces CH2= CB2 which is our experimental evidence for the insertion mechanism. Ou r observations confirm the step concerning the propagation of the carb on chain in the Fischer-Tropsch processes.