THE ASSYMETRIC N-O STRETCH FUNDAMENTAL BAND OF NITROMETHANE: FTIR JET SPECTRA AND ASSIGNMENTS OF THE LOWEST 3 INTERNAL ROTOR STATES
Loading...
Date
2004
Journal Title
Journal ISSN
Volume Title
Publisher
Ohio State University
Abstract
The rotationally resolved spectrum of the b-type band near $1584 cm^{-1}$ of nitromethane has been recorded using the Bruker-120HR FTIR coupled to a continuous slit-jet expansion at PNNL. The rotational temperature of the spectrum is approximately 15K with a spectral resolution of $0.0025 cm^{-1}$. Assignments have been made for 649 transitions using ground state combination differences. For the $m^{\prime} = 0$ internal rotor state, 370 transitions reaching $J^{\prime} \leq 18$ and $K^{\prime}_{a} \leq 5$ have been assigned. For the $m^{\prime} = 1$ state, 232 transitions with $J^{\prime} \leq 15$ and $K^{\prime}_{a} \leq 4$ have been assigned. For the $m^{\prime} = 2$ state, 47 transitions with $J^{\prime} \leq 12$ and $K^{\prime}_{a} = 1$ have been assigned. The $J^{\prime}$-levels in the $K^{\prime}_{a} = 5$ in the $m^{\prime} = 0$ state are split by a perturbation.
Description
Author Institution: University of Akron; Youngstown State University; Pacific Northwest National Laboratory; University of Copenhagen