Fourier Transform Far-Infrared Spectroscopy of the NH2, NHD, and ND2Radicals

✍ Scribed by Isamu Morino; Kentarou Kawaguchi

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 400 KB
• Volume: 182
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1996.7221

✦ Synopsis

The gas-phase far-infrared absorption spectra of the NH 2 , NHD, and ND 2 radicals have been observed in the 51-366 cm 01 region with a high-resolution Fourier transform spectrometer. The NH 2 radical was generated in a multipletraversal absorption cell by a dc discharge in an NH 3 and Ar mixture. A discharge in an NH 3 , D 2 , and Ar mixture was used for production of NHD and ND 2 . The observed spectra with a resolved fine structure were analyzed by Watson's A-reduced Hamiltonian including a spin-rotation interaction term. The rotational and spin-rotation constants were determined to higher order. In the same experiment of NH 2 , the rotational spectrum of the NH radical was also observed. From the rotational constants, inertia defect D and r 0 structure were determined, as follows, with one standard deviation in parentheses: ᭧ 1997 Academic Press NH 2 ND 2 r 0 (A ˚) 1.0245(37) 1.0239(19) u 0 (degree) 103.34(51) 103.33(27) D obs (amuA ˚2) 0.049561(4) 0.06770(4) D calc (amuA ˚2) 0.047653 0.066566 atic study was reported by Davies et al. (11), who measured 428