n-ペンタン,イソペンタンおよびネオペンタンのRaman,IRならびに1H-NMRスペクトル

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  • n ペンタン イソペンタン オヨビ ネオペンタン ノ Raman IR ナラビ
  • The Raman, IR, and 1H-NMR Spectra of n-pentane, isopentane and neopentane

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A n-pentane should be expected to have a C2v symmetry for a rigid structure, even if it would have the highest symmetry. However the obtained vibrational spectrum of a npentane seems to be explained on the basis of a non-rigid D3d symmetry with the rotating CH2 group. The vibrational spectra of an isopentane and a neopentane are assigned in terms of a non-rigid C3v and a non-rigid Td symmetry with an internal rotation, respectively. These structures for n-, iso, and neopentanes are strongly supported by the proton NMR spectra, too.

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