Radial Distribution of Electrons in the Ammonia and Hydrogen Sulfide Molecules

The model of ``floating'' hydrogen electron densities has been applied in detail to the molecules NH3 and H2S, both of the form XHn. In this way it has been shown that a reasonable radial distribution of electrons within these molecules may be obtained fairly easily from a knowledge of the molecular rotational magnetic moment which, in turn, is based on molecular beam or Zeeman effect microwave observations. Some measure of the accuracy of these molecular electron densities has been obtained by calculating the coherent x-ray scattering factor and comparing it with the corresponding experimental values. Included in the present calculations for H2S is a determination of the paramagnetic contribution to the molar diamagnetic susceptibility. In addition, values of the molar diamagnetic susceptibility have been found for NH3 and H2S which are in good agreement with the experimental results.