Abstract
Abstract The mean amplitudes and the interatomic distances of BBr3 have been determined by the sector-microphotometer method of gas electron diffraction. The B–Br and Br–Br distances (rg) have been found to be 1.8932±0.0054 Å and 3.2830±0.0053 Å respectively. The values of the mean amplitudes are dependent on the atomic scattering factors used in the analysis. The complex scattering factors for B and Br, as calculated on the basis of the Hartree-Fock potential, have given mean amplitudes which are consistent with the vibrational frequencies observed by spectroscopy, while the mean amplitudes derived from the use of other scattering factors are less reasonable. It has been shown that the Hartree-Fock function for the Br atom is a better representation of the atomic potential function than the Thomas-Fermi function. The utility of the method of gas electron diffraction for the study of atomic scattering factors and atomic potential functions in some favorable cases has been pointed out.
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