Abstract: | Abstract The structure of the liquids 1-Methylnaphthalene C10H7—CH3 and 1-Chloronaphthalene C10H7—Cl was investigated using X-ray diffraction at 293 K. Monochromatic radiation MoKα (λ = 0.7107Å) enabled determination of the scattered radiation inteasity between S0 = 4pi sin υ0/λ = 0.430 Å?1 and S max = 14.311 Å-1. Angular distributions of X-ray scattered intensity were measured, and differential radial distribution functions of electron density (DRDFs) were calculated. The mean distances between the neighbouring molecules and the ranges of the spheres of intermolecular ordering were found. X-ray structural analysis was applied for determination of the packing coefficient of molecules of the liquids studied. A simple model of short-range arrangement of the molecules was proposed, which seems to be valid for other weakly polar monosubstituted naphthalene derivatives in the liquid phase. |