FAR-INFRARED LASER MAGNETIC RESONANCE SPECTROSCOPIC STUDY OF THE $\nu_{2}$ BENDING FUNDAMENTAL OF THE CCN RADICAL IN ITS $\tilde{X}^{2}\Pi_{r}$ STATE
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Date
1998
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Ohio State University
Abstract
Vibration-rotation transitions between the (010) $\mu^{2}\Sigma^{-} - (000) \tilde{X}^{2}\Pi_{r}$ vibronic states, were recorded using far-infrared laser magnetic resonance (FIR-LMR) spectroscopic techniques. These transitions occur near $200 cm^{-1}$ for the $(010) \mu^{2}\Sigma^{-} - (000) \tilde{X}^{2}\Pi_{1/2}$ transition and $160 cm^{-1}$ for the $(010) \mu^{2}\Sigma^{-} - (000) \tilde{X}^{2}\Pi_{3/2}$ transition. This is the first direct measurement of the $\nu_{2}$ band of CCN and in conjunction with a fit of optical data, similar to the one found in the paper by Kohguchi $et al.,^{a}$ has resulted in an accurate determination of the bending vibration frequency and the Renner parameter. The data were fit using an $N^{2}$ effective Hamiltonian modified to include the Renner-Teller effect.
Description
$^{a}$H. Kohguchi, Y. Ohshima, Y. Endo, J. Chem. Phys. 106, 5429 (1997).
Author Institution: Time and Frequency Division, National Institute of Standards and Technology; The Physical Chemistry Laboratory, Oxford University
Author Institution: Time and Frequency Division, National Institute of Standards and Technology; The Physical Chemistry Laboratory, Oxford University