Mean Square Amplitudes and Force Constants of Tetrahedral Molecules. I. Carbon Tetrachloride and Germanium Tetrachloride

Abstract

The atomic distances and mean square amplitudes of carbon tetrachloride and germanium tetrachloride were measured by the sector-microphotometer method of electron diffraction. The force constants were calculated by use of the mean square amplitudes thus obtained, combined with the normal frequencies. The results indicate that a force field of the Urey-Bradley type is approximately realized in these molecules.