The Double Minimum Problem Applied to the Ammonia Molecules

Abstract
A simple quantum‐mechanical calculation has been made to obtain the doublet separations for the parallel type frequencies of the ammonias. The calculated values for the separations are: NH2D (21), NHD2 (11) and ND3 (5.8) cm—1, which compare favorably with observed values: NH2D (20), NHD2 (10) and ND3 (3.4) cm—1.