Bromine-81 nuclear quadrupole resonance and aluminum-27 nuclear magnetic resonance in AlBr3 complexes.
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概要
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The Zeeman effect on <SUP>81</SUP>Br NQR and the quadrupole effect on <SUP>27</SUP>Al NMR in L·AlBr<SUB>3</SUB> complexes (L=KBr, POBr<SUB>3</SUB>, and H<SUB>2</SUB>S) were studied at room temperature. It was found that the <SUP>27</SUP>Al quadrupole-coupling constant for these complexes decreases with decreasing coupling constant of the <SUP>81</SUP>Br atom in –AlBr<SUB>3</SUB> and that the atomic arrangement about the Al atom has C<SUB>3V</SUB> symmetry in POBr<SUB>3</SUB>·AlBr<SUB>3</SUB> and H<SUB>2</SUB>S·AlBr<SUB>3</SUB>. In the latter complex, H<SUB>2</SUB>S molecule is reorientated at room temperature. The amount of charge transfer in these complexes was estimated on the basis of the Townes-Dailey theory and the bond angle ∠Br–Al–Br was found to depend on the amount of the charge transfer. The temperature dependence of the <SUP>81</SUP>Br NQR frequencies was observed in order to obtain information about molecular motion in H<SUB>2</SUB>S·AlBr<SUB>3</SUB> and POBr<SUB>3</SUB>·AlBr<SUB>3</SUB>.
- 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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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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