Nuclear quadrupole resonance of AlBr3 molecular complexes.
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概要
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We observed the <SUP>81</SUP>Br NQR of several molecular complexes of AlBr<SUB>3</SUB> with amines such as (CH<SUB>3</SUB>)<SUB>3</SUB>N, C<SUB>5</SUB>H<SUB>5</SUB>N, C<SUB>6</SUB>H<SUB>5</SUB>NH<SUB>2</SUB>, and (C<SUB>6</SUB>H<SUB>5</SUB>)<SUB>2</SUB>NH. All the <SUP>81</SUP>Br resonance lines were found in the frequency range of 78–86 MHz at room temperature except for AlBr<SUB>3</SUB>·2C<SUB>5</SUB>H<SUB>5</SUB>N. From the Zeeman analysis, it was proved that AlBr<SUB>3</SUB>·2C<SUB>5</SUB>H<SUB>5</SUB>N should be expressed with the molecular formula 2AlBr<SUB>3</SUB>·4C<SUB>5</SUB>H<SUB>5</SUB>N and contains cation species AlBr<SUB>2</SUB>(C<SUB>5</SUB>H<SUB>5</SUB>N)<SUB>4</SUB><SUP>+</SUP> with two <SUP>81</SUP>Br resonance lines near 70 MHz and anion species AlBr<SUB>4</SUB><SUP>−</SUP> with four <SUP>81</SUP>Br resonance lines near 80 MHz. The two <SUP>81</SUP>Br resonance lines of AlBr<SUB>3</SUB>·(CH<SUB>3</SUB>)<SUB>3</SUB>N disappeared at about 40 °C due to hindered rotation of the whole molecule. The lower two <SUP>81</SUP>Br resonance lines of AlBr<SUB>2</SUB>(C<SUB>5</SUB>H<SUB>5</SUB>N)<SUB>4</SUB><SUP>+</SUP> have positive temperature coefficients.
- 公益社団法人 日本化学会の論文
著者
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Okuda Tsutomu
Department Of Bio-recycling Faculty Of Engineering Hiroshima Kokusai Gakuin University
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Ishihara Hideta
Department Of Chemistry Faculty Of Education Saga University
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Ohta Hiroshi
Department Od Cardiovascular Medicine Juntendo University
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Yamada Koji
Deparment Of Food Science And Technology Faculty Of Agriculture Kyushu University
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Negita Hisao
Department Of Chemistry Faculty Of Science Hiroshima University
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Ohta Hiroshi
Department of Chemistry, Faculty of Science, Hiroshima University
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