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A variational method employing the unperturbed ground‐state wave function for the molecule is used to calculate the shielding of the proton in the hydrogen and hydrogen halide molecules. Surprisingly good results are obtained in view of the approximations employed in the calculation. The...
The microwave spectrum of methyl silane has been reinvestigated. Seven symmetric top and ten asymmetric top isotopic species have been studied. These molecules, together with the six symmetric tops studied by Lide and Coles, yield a total of thirty‐three rotational constants. A least‐squares...
A theory of the red shift of low‐lying electronic bands of nonpolar molecules in nonpolar solvents is presented. The difference between the dispersion forces in the ground and excited states is investigated by perturbation theory and an approximate formula is derived according to which (in...
A detailed analysis of the spectrum of graphite and boron nitride that began in Part I with a description of the two‐dimensional spectrum neglecting the interaction between layers is completed here with the inclusion of the coupling between layers. Of particular interest is the low‐frequency...
The general nuclear magnetic shielding theory of Ramsey is developed for the case of ``long‐range'' nuclear shieldings. Such shieldings arise from the magnetization induced in molecular electrons localized to groups one or more bond lengths removed from the shielded nucleus....
In order to clarify the nature of activated adsorption, the adsorption of nitrogen on the freshly evaporated barium film, the replacement of the adsorbed nitrogen by oxygen and the liberation of the nitrogen by means of electron impacts were studied. Immediately after the adsorption a portion of...
The relationships between the absorption coefficient, the true average absorption coefficient, and the pressure independent ``average'' absorption coefficient are considered. It is found that the absorption coefficient will equal the pressure independent average absorption coefficient provided...
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