Journal
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
Volume 95, Issue 12, Pages 1680-1686Publisher
CHEMICAL SOC JAPAN
DOI: 10.1246/bcsj.20220271
Keywords
Electron distribution; Liquid benzene; X-ray-neutron difference function
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The deviation of electron distribution from spherical density around atomic nuclei in liquid benzene has been directly obtained through experimental evidence, revealing both regions of higher and lower electron density.
Deviation of electron distribution around atomic nuclei from the spherical density in liquid benzene has directly been obtained through a X-ray-neutron difference interference function derived from the difference between the intermolecular X-ray diffraction interference term and the linear combination of neutron intermolecular partial structure factors weighted by atomic scattering factors for the X-ray scattering. The difference distribution function exhibits a broad negative peak at around r = 3.24 angstrom corresponding to intermolecular distance in which electron density is relatively lower than that for the spherical case. Positive peaks found at r = 4.30, 5.22, and 6.20 angstrom indicate intermolecular distances with higher electron density. This experimental evidence for intermolecular electron distribution in the liquid benzene has been discussed by means of the average molecular geometry of the nearest neighbor benzene molecules which was determined from the least squares analyses of observed neutron intermolecular partial structure factors.
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