: |
: |
|---|
DAVID S. PERRY, LOU DEGLIUMBERTO, University of Akron, Akron, OH 44325; WENDY HEISERMAN, REBECCA COOK, HOWARD D. METTEE, Youngstown State University, Youngstown, OH 44555; ROBERT L. SAMS, Pacific Northwest National Laboratory, Richland, WA 99352; GEORG O. SORENSEN, University of Copenhagen, DK-2100, Copenhagen, Denmark.
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 '=0 internal rotor state, 370 transitions reaching J '\leq 18 and K a' \leq 5 have been assigned. For the m '=1 state, 232 transitions with J '\leq 15 and K a' \leq 4 have been assigned. For the m '=2 state, 47 transitions with J ' \leq 12 and K a'=1 have been assigned. The J '-levels in the K a'=5 in the m '=0 state are split by a perturbation.