engleski

UV photoelectron spectroscopy and outer valence electronic structure of dihalobenzenes

The electronic structures of nine dihalobenzenes (C6H4FX ; X = Cl, Br, I) have been studied by UV photoelectron spectroscopy (UPS) and assigned by comparison with the reported spectra of monoha-lobenzenes (C6H5X ; X = Cl, Br, I). and quantum chemical calculations. Our results show that the fluorine substituent modifies energies of π- and halogen lone pair orbitals to a significant degree depending on its location (topology). We also demonstrate that the inductive effect of fluorine atom on the benzene ring can be readily observed and interpreted.

halobenzenes; inductive effect; resonance effect

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