Molecular beam infrared spectrum of nitromethane in the region of the first C-H stretching overtone

The kinetics of nitromethane in the initial C-H stretching overtone region was examined at intense high resolution utilizing a molecular beam laser spectrometer to determine the intramolecular vibrational energy redistribution (IVR) rate of the C-H stretch. It was observed that the spectrum of the C-H stretching element contained three types of band. It observed that the IVR rate of the different JKaKc levels in the spectrum ranged from 170 to 300 ps equivalent to the rate calculated for methyl C-H stretching overtones in molecules of similar size.