dc.creator Hight Walker, A. R. en_US dc.creator Suenram, R. D. en_US dc.creator Lovas, F. J. en_US dc.date.accessioned 2007-11-20T17:10:13Z dc.date.available 2007-11-20T17:10:13Z dc.date.issued 1995 en_US dc.identifier 1995-RI-11 en_US dc.identifier.uri http://hdl.handle.net/1811/29681 dc.description $^{1}$ Thesis, Peter Lee, University of Michigan, 1971 International Symposium on Molecular Spectroscopy Symposium, paper C10, 1970 en_US dc.description Author Institution: National Institute of Standards and Technology, Gaithersburg, MD 20899 en_US dc.description.abstract Following on the previous work of $Lee et. al^{-1}$, further experiments have been carried out on $CH_{3}CH_{2}CH_{2}CHO$ using a pulsed-nozzle Fourier transform microwave spectrometer. The four singly substituted $^{13}C$ and the $^{18}O$ isotopomers were assigned in natural abundance for both conformers. With this information a definitive structural determination could be performed. The two assigned conformers are drawn below. The trans-tran conformer, the lower in energy, is heavy-atom planar and exhibits a strong a-type spectrum with weaker >b-type transitions also observed. The gauche-tran conformer has the terminal methyl group out of the plane by nearly $100^{\circ}$. Due to the lack of symmetry in this second conformer, a-, b-, and c- type transitions are observed Many remaining unassigned lines suggests yet another conformer may exist in the 1 K beam. Work is presently underway to study the effect of carrier gas on conformational cooling in this molecule. Also, ab init calculations are being performed to provide insight into the conformational energy differences and barrier heights. en_US dc.format.extent 62975 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title ROTATIONAL SPECTRUM OF TWO CONFORMERS OF n-BUTYRALDEHYDE en_US dc.type article en_US
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