Physical properties and chemical constitution. Part L. The electric dipole moments of alkoxy-, alkylthio-, and related compounds of carbon, silicon, and germanium

Abstract

The electric dipole moments of compounds belonging to the series Me_{4 –n}X(OMe)_n and Me_{4 –n}X(SMe)_n, where n= 1–4 and X = C, Si, or Ge, have been measured in benzene solution at 25·00°. The results indicate that the methyl groups rotate relatively freely about Si–O and Ge–O bonds, but in the other cases considered (C–O, C–S, Si–S, and Ge–S) the dipole moments calculated for fixed molecular conformations are in better agreement with the experimental results. Other compounds have also been investigated to study further the rotation about Si–O bonds.