Far-Infrared Laser Magnetic Resonance Spectroscopy of CH2Cl (X̃2B1)

✍ Scribed by T.J. Sears; F. Temps; H.G. Wagner; M. Wolf

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 434 KB
• Volume: 168
• Category: Article
• ISSN: 0022-2852
• DOI: 10.1006/jmsp.1994.1266

✦ Synopsis

Far-infrared laser magnetic resonance (FIR-LMR) spectra of (\mathrm{CH}{2}{ }^{35} \mathrm{Cl}\left(\dot{X}^{2} B{1}\right)) observed at three FIR wavelengths in the range (450 \mu \mathrm{m} \leqslant \lambda \leqslant 750 \mu \mathrm{m}) have been analyzed and assigned. The spectra were obtained using three different source reactions, (\mathrm{F}+\mathrm{CH}{3} \mathrm{Cl} \rightarrow \mathrm{CH}{2} \mathrm{Cl}+\mathrm{HF}, \mathrm{Cl}) (+\mathrm{CH}{2} \mathrm{CO} \rightarrow \mathrm{CH}{2} \mathrm{Cl}+\mathrm{CO}), and (\mathrm{Na}+\mathrm{CH}{2} \mathrm{Cl}{2} \rightarrow \mathrm{CH}{2} \mathrm{Cl}+\mathrm{NaCl}). The resonances at the three FIR wavelengths were attributed to (a)-dipole transitions involving relatively high rotational states ((12 \leqslant N \leqslant 20) and (2 \leqslant K \leqslant 6)). The spectra could be simulated satisfactorily based upon the molecular parameters derived by Endo et al. [Can. J. Phys. 62, 1347-1360 (1984)] from the millimeterwave spectrum of much lower rotational states of the radical. The agreement which was obtained shows that the (\mathrm{CH}{2} \mathrm{Cl}) radical possesses a rather rigid structure. (C) 1994 Academic Press. Inc.