Temperature Dependences of the Nuclear Quadrupole Resonance Frequencies in 1,4-Dihalogenocyclohexanes

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概要

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• The temperature dependences of the <SUP>79</SUP>Br and <SUP>127</SUP>I nuclear quadrupole resonance frequencies in 1,4-dihalogenocyclohexanes were investigated. According to Bayer's theory (Eq. 8), the torsional frequencies were calculated by the use of the calculated moments of inertia and the experimental values of the temperature coefficients of the resonance frequencies at various temperatures. From a comparison of the torsional frequencies, the line of higher frequency at 77°K in <I>cis</I>-1,4-dibromocyclohexane may be assigned to the equatorial bromine nucleus. All the calculated torsional frequencies decrease with the increasing temperature. Such variation in the frequencies agrees with the variation obtained by Raman studies of various molecules in crystals. The resonance lines in the trans-compounds fade out at temperatures considerably below their melting points.

• 公益社団法人 日本化学会の論文

著者

• Tokuhiro Tadashi

  Research Laboratory of Spectroscopy Tokyo Institute of Technology

関連論文

• Temperature Dependences of the Nuclear Quadrupole Resonance Frequencies in 1,4-Dihalogenocyclohexanes

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