Molecular motions in sodium tetrachloroaurate dihydrate as studied by the proton and chlorine nuclear relaxation times.
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概要
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The <SUP>1</SUP>H and <SUP>35</SUP>Cl relaxation times in NaAuCl<SUB>4</SUB>·2H<SUB>2</SUB>O have been measured at temperatures between 79 and 350 K. The <SUP>1</SUP>H <I>T</I><SUB>1</SUB> data revealed that the water molecule of crystallization reorients about its C<SUB>2</SUB> axis with an activation energy of 26 kj mol<SUP>−1</SUP>. The <SUP>35</SUP>Cl <I>T</I><SUB>1</SUB> values of the four NQR absorptions indicated that the reorientation of the water molecule makes no important contribution to the chlorine <I>T</I><SUB>1</SUB> in spite of the hydrogen bonds between them. A brief analysis of the <SUP>35</SUP>Cl <I>T</I><SUB>1</SUB> led to a frequency of 58 cm<SUP>−1</SUP> for the torsional vibration of the AuCl<SUB>4</SUB><SUP>−</SUP> ion.
- 公益社団法人 日本化学会の論文
著者
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Kiriyama Hideko
The Institute of Scientific and Industrial Research, Osaka University
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Kiriyama Ryôiti
The Institute of Scientific and Industrial Research, Osaka University
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Sagisawa Kensho
The Institute of Scientific and Industrial Research, Osaka University
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