An NMR study on molecular interactions in 3-methylsydnone and its aqueous mixtures.
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概要
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Molecular motion in neat 3-methylsydnone and molecular interaction in 3-methylsydnone–water mixtures were studied by the multinuclear FT-NMR method. The estimated rotational correlation times of the methine carbon and the carbonyl oxygen atom in neat sydnone are 8.6 and 8.1 ps at 40 °C, respectively. According to shift variations of the <SUP>13</SUP>C, <SUP>14</SUP>N, and <SUP>17</SUP>O nuclei of the sydnone molecule in sydnone–water mixtures, the sydnone forms a hydrogen bond with water at the carbonyl oxygen and not at the ring oxygen site. The effect of dissolved paramagnetic ions was investigated on the <SUP>13</SUP>C spin-lattice relaxation time of the carbon atoms of sydnone, and a discussion was made on the possible relative configuration of cation and anion to the solvent sydnone molecule.
著者
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Tanaka Shoji
Department Of Applied Physics Faculty Fo Engineering University Of Tokyo
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Yokoi Masatoki
Department of Chemistry, Faculty of Science, Shinshu University
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