Manifestation of strong quadrupole light-molecule interaction in the SEIRA spectra of some symmetrical molecules

It is demonstrated, that the forbidden lines, which were observed in the SEIRA spectra of diprotonated BiPyH 2 2 + and ethylene, adsorbed on Cu, as well as on ethylene, adsorbed on mordenites can be explained on the base of the Dipole–Quadrupole theory of SEIRA and is the consequence of the existence of the strong quadrupole light-molecule interaction.