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The transmission of low-energy electrons (0–15 eV) through thin films of benzene, toluene, pyridine, aniline, styrene, and cyclohexene was studied. The electron transmission spectra of all the aromatic compounds studied are like each other in their forms. The energies of several prominent peaks in the electron transmission spectra are in good agreement with those of temporary anion states measured in the gas phase. It is suggested that vacant orbitals of free molecules form conduction bands in molecular crystals.
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Hiraoka et al. (1984) studied this question.
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