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Abstract:
Applying high-resolution electron energy loss spectroscopy we identify two precursor states, i.e. adsorbed phenyl (C6H5) and benzyne ( C6H4) in line with a recent photoemission and temperature-programmed desorption study. Dipole selection rules are used to deduce information on the adsorbate geometries of the species. Both intermediate species are proposed to be bonded to the substrate with the six-membered ring plane inclined with respect to the surface plane. The inclination angle of the phenyl species is smaller than that of the benzyne species.
