ジメチルケトン,メチルエチルケトン,ジエチルケトン,ジメチルアミンおよびジエチルアミンのRaman,IRならびにNMR

浜田, 圭之助, 森下, 浩史

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Other Title

ジメチルケトンメチルエチルケトンジエチルケトンジメチルアミンオヨビジ
The Raman, IR and NMR of Dimethyl, Methylethyl, and Diethyl Ketone and Dimethyl, and Diethyl Amine

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Description

The authors obtain the Raman, IR and NMR spectra of CH3-CO-CH3, CH3-CO- -C2H5, C2H5-CO-C2H5, CH3-NH-CH3 and C2H5-NH-C2H5. The spectra have been analysed on the basis of a bent structure, but the present observations show that the obtained spectra can be explained on the basis of a non-rigid linear structure, in which CH2 group rotates freely with respect to the three hydrogen atoms of CH3 group. Because the observations are in good agreement with theoretical expectations for a nonrigid D3d model for R-CO-R and R-NH-R (R=CH3, C2H5) and for a non-rigid C3v model for CH3-CO-C2H5. A non-rigid structure is strongly supported by the NMR spectra. It seems to the authors sufficient evidence to justify a non-rigid linear model for C2H5-COC2H5 and CH3-CO-C2H5 that the both spectra are too simple to be explained on the basis of a bent model and that the coincidence between Raman and infrared frequencies which is the one of spectral features of C3v symmetry for CH3-CO-C2H5 occurs and the lack of coincidence between Raman and infrared frequencies which is the drastic one of spectral features of D3d symmetry with a symmetry center for C2H5-CO-C2H5 and C2H5-NH-C2H5 except in the frequencies due to CH2 group occurs.

Journal

Science bulletin of the Faculty of Education, Nagasaki University

Science bulletin of the Faculty of Education, Nagasaki University 28 51-58, 1977-02-28

長崎大学教育学部