A Reinvestigation of the First Band in the Photoelectron spectrum of the Ethyl Radical

Article abstract of DOI:10.1021/j150656a027

The first photoelectron band of the ethyl radical, produced from the reaction of fluorine atoms with ethane, has been recorded with a new multidetector photoelectron spectrometer using He I radiation.A regular vibrational series (with average separations of 400 +/- 30 cm^-1) was observed which is attributed to excitation of the pyramidal bending mode in the ion.The vertical ionization energy of the observed band is measured as 8.51 +/- 0.01 eV and an upper limit of the adiabatic ionization energy is obtained as 8.26 +/- 0.02 eV.Two other methods of generating the ethyl radical, namely, pyrolysis of azoethane and pyrolysis of n-propyl nitrite, are shown to be less suitable sources for PES investigatios of this radical.