Inertia, Nuclear Distances and Dissociation Energies

If the masses arc known, the nuclear distance can be calculated. A few nuclear distances ascertained in this way are tabulated in Table 18. Generally, complete evaluation of rotation fine structure of a molecular 

Molecule Nuclear distance in A Dissociation energy Molecule Nuclear distance in A Dissociation energy  

It may be observed here that inferences may be drawn from the rotation fine structure of molecular spectra, using equation (13), regarding the presence and proportions of isotopes, a circumstance that led to the discovery of the isotopes of nitrogen and oxygen.  

In addition to this geometrical evidence, the band spectra allow further conclusions regarding the dissociation energy of di-atomic molecules. We proceed from the oscillation spectrum which, for large oscillation 

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