Diffraction of X-Rays and Electrons by Carbon Tetrachloride Vapour

Abstract

RECENT electron-diffraction investigations¹ of the molecular structure of gaseous carbon tetrachloride give values of the interatomic distances, which are appreciably lower than those obtained in earlier electron-diffraction measurements and those obtained by Bewilogua² from X-ray photographs. This discrepancy of about 4 per cent is so important that it cannot be explained by the probable errors given by the authors. As, moreover, carbon tetrachloride is generally used as a standard substance for testing the apparatus, it seemed to us to be of interest to compare X-ray and electron-diffraction results from as wide a field as possible with the corresponding theoretical calculation, using in both cases the most trustworthy experimental methods.