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Reinvestigation of the Microwave Spectrum of Acetamide



R D. Suenram, G Y. Golubiatnikow, I Leonov, Jon T. Hougen, J Ortigoso, I Kleiner, Gerald T. Fraser


A total of 57 jet-cooled Fourier transform and 30 submillimeter measurements for acetamide have been recorded using a new version of our spectrometer which has been upgraded with a heated nozzle and an expanded automatic scanning range. The 115 transitions obtained by adding our new measurements to the literature data have been globally fit to a model involving 28 torsion, rotation, and torsion-rotation interaction parameters to near experimental uncertainty (I.e., to a weighted standard deviation of 1.5), significantly improving on previous fits. Various theoretical problems associated with K labels for E-species levels are briefly discussed and used to justify a variant of the signed Ka labels frequently used for internal-rotor E states.
Journal of Molecular Spectroscopy
No. 2


acetamide, Fourier-transform microwave spectroscopy, global fit, internal rotation, quadrupole splittings, rotational analysis


Suenram, R. , Golubiatnikow, G. , Leonov, I. , Hougen, J. , Ortigoso, J. , Kleiner, I. and Fraser, G. (2001), Reinvestigation of the Microwave Spectrum of Acetamide, Journal of Molecular Spectroscopy (Accessed June 3, 2023)
Created August 1, 2001, Updated February 17, 2017