Radical trapping by gold chlorides forming organogold intermediates.
Organogold compounds arising from the trapping of carbon-centered radicals by gold chlorides (AuCl, AuCl3, and HAuCl4) and colloidal gold have been characterized by different spectroscopic techniques. Laser flash photolysis has provided kinetic evidence of the occurrence of radical trapping in the microsecond time scale, while theoretical calculations give the energetics of the elementary steps. The trapping of carbon radicals by gold species observed here may explain why the presence of radical initiators enhance dramatically the activity of gold catalysts for some reactions occurring through radical intermediates.
Aprile
Carmela
C
Instituto de Tecnología Química CSIC-UPV and Departamento de Química, Universidad Politécnica de Valencia, Avda de los Naranjos s/n, 46022 Valencia, Spain.
Boronat
Mercedes
M
Ferrer
Belén
B
Corma
Avelino
A
García
Hermenegildo
H
D005609:Free Radicals / Q000138:chemical synthesis / Q000737:chemistry / Q000528:radiation effects; D017612:Gold Compounds / Q000737:chemistry*; D050607:Organogold Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000528:radiation effects*; D014466:Ultraviolet Rays
D005609:Free Radicals; D017612:Gold Compounds; D050607:Organogold Compounds; C038016:gold chloride