The ground vibrational states of PH 2 D and PHD 2

High-Resolution Study of the Three Lowest Infrared Bands of PHD2

“…(1,2), is devoted to the high resolution spectra and their analysis of the three lowest-lying fundamental bands of PHD 2 . Interest in the spectroscopy of the phosphine molecule and its isotopomers is caused both by their relevance for astrophysics (see, e.g., (3)(4)(5)), and by theoretical aspects, which follow from the fact that phosphine is a basic and one of the lightest polyatomic molecules.…”

“…As a consequence, spectroscopic effects and peculiarities should be particularly pronounced in the spectra of phosphine species. Both PH 3 and PD 3 and the partially deuterated PH 2 D species have been studied to some extent (see, e.g., (1,2,(6)(7)(8) and references cited therein). As to PHD 2 , this has been studied only in the microwave region (9)(10)(11)(12)(13), and recently in the far infrared regions (1).…”

Isotopic Effects in XH3 (C3v) Molecules: The Lowest Vibrational Bands of PH2D Reinvestigated

“…First, the ground state rotational energies obtained in (11) are significantly more accurate than those obtained in Refs. (9,10), because of the large body of more accurate data, and this is of relevance also for the excited states.…”

“…The synthesis of phosphine enriched to 60% PHD 2 , 25% PH 2 D, 10% PD 3 , and 5% PH 3 (sample A) has been described (11). Moreover, a sample composed of 5% PH 2 D, 10% PHD 2 , and 85% PD 3 (sample B) was available for comparison and iden- 1 In the first step of the analysis, values of the rotational parameters were roughly estimated from the fit of the energy levels with the quantum number J = 0 and 1.…”

“…(11). For convenience, the ground state rotational parameters are included in Table 4 and given in column 2.…”