# EIGENSTATE RESOLVED INFRARED AND MILLIMETER WAVE- INFRARED DOUBLE RESONANCE STUDY OF METHYLAMINE IN THE N-H STRETCH OVERTONE REGION

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 Title: EIGENSTATE RESOLVED INFRARED AND MILLIMETER WAVE- INFRARED DOUBLE RESONANCE STUDY OF METHYLAMINE IN THE N-H STRETCH OVERTONE REGION Creators: Srivastava, H. K.; Callegari, A.; Lehmann, K. K.; Scoles, G.; Merker, U. Issue Date: 1996 Abstract: The infrared spectrum of methylamine, $CH_{3}NH_{2}$, was recorded in the region of the $\nu_{1} + \nu_{10}$ N-H stretching overtone ($6600 cm^{-1}$), using a molecular beam laser spectrometer with optothermal detection. This molecule is an interesting benchmark for the study of intramolecular vibrational energy redistribution (IVR) because of its two large amplitude internal motions: $CH_{3}$ rotation and $NH_{2}$ wagging that are coupled togethar. However this also makes assigning the spectrum a challenge due to its extreme congestion. The single photon spectrum yields a density of approximately 1000 lines/$cm^{-1}$. Millimeter wave-infrared double resonance has been used to isolate the contributions from a single ground state. Preliminary inspection of the double resonance spectrum suggests that the IVR rates are faster than those observed for molecules of comparable structure and size. $^{b}$ Analysis of the data is in progress, and further results will be presented at the conference. URI: http://hdl.handle.net/1811/13684 Other Identifiers: 1996-TG-09