Abstract
The laser magnetic resonance spectrum of the ν2 band of ND2 (ν0=1108.7493 cm−1) has been observed using a CO2 laser in the 9–10 μm region. By a least-squares fit of over 300 resonances, the ν2 band origin and the rotational, centrifugal distortion, and spin–rotation parameters for both the ground (000) and excited (010) vibrational states were determined. A transition arising from the (020) → (010) hot band was also tentatively identified, and this allowed a determination of the hot band origin. A comparison of ND2 and NH2, along with some other doublet asymmetric rotor molecules for which deuterated species have been studied, showed that the spin–rotation interaction constants (εaa, εbb) scale quite accurately with rotational constants (A,B) between isotopic species.
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