Pure Rotational Spectra of the Partially Deuterated Ammonias in the Far Infrared Spectral Region

Abstract

Rotational spectra of NH2D and NHD2 have been measured in the spectral range from 30 to 200 cm—1. The inversion splitting of the NH2D lines has been observed. The spectra have been analyzed to obtain term values for many of the low J rotational levels of the ground states of those molecules. The effects of centrifugal distortion on the energy levels is discussed. Molecular constants and dimensions are obtained.