Amino Wagging of the <I>tert</I>-Butylamine in <I>Ã</I> Electronic State

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概要

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• Ultraviolet absorption spectra of two isotopic <I>t</I>-butylamines, (CH<SUB>3</SUB>)<SUB>3</SUB>CNH<SUB>2</SUB> and (CH<SUB>3</SUB>)<SUB>3</SUB>CND<SUB>2</SUB>, have been observed in their gaseous state in the spectral region 2000–2500 Å. There is an electronic band, whose 0–0 band peaks are observed respectively at 2351.2 and 2334.9 Å. The vibrational structure of the band, caused by the amino wagging vibration, was analyzed. On the basis of the observed energy levels, the potential function of the excited molecule along the amino wagging coordinate was determined; it is nearly harmonic with a small positive quartic term. The dependence of intensity on the vibrational quantum number and the intensity ratio of the fundamental and the hot bands indicate that the equilibrium structure of the amino group is the same as that of methylamine; the angle between the C–N axis and the HNH plane has been determined to be 51± 4°.

• 公益社団法人 日本化学会の論文

著者

• Tsuboi Masamichi

  Faculty of Parmaceutical Sciences, The University of Tokyo

• Hirakawa Akiko

  Faculty of Pharmaceutical Sciences, The University of Tokyo

• Miyazaki Hideyuki

  Faculty of Pharmaceutical Sciences, The University of Tokyo

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