A Simple Relation among the Energy Differences between Conformers of XH<SUB>2</SUB>C-CH<SUB>2</SUB>Y, C<SUB>6</SUB>H<SUB>11</SUB>X, C<SUB>6</SUB>H<SUB>11</SUB>Y, and <I>trans</I>-1,2-C<SUB>6</SUB>H<SUB>10</SUB>XY
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概要
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By measuring the infrared intensities, the energy differences between two conformers have been determined for bromocyclohexane, iodocyclohexane, <I>trans</I>-1-bromo-2-chlorocyclohexane, 1-bromo-2-chloroethane, ethylene bromohydrin, and ethylene iodohydrin in dilute solutions, and for cyclohexanol, <I>trans</I>-2-chlorocyclohexanol, ethylene chlorohydrin, and ethylene bromohydrin in vapors.<BR>It was ascertained that the following relation holds for the energy differences:<BR><I>E<SUB>t</SUB></I>−<I>E<SUB>g</SUB></I>=(<I>E<SUB>aa</SUB></I>−<I>E<SUB>ee</SUB></I>)−(<I>E<SUB>a</SUB></I>−<I>E<SUB>e</SUB></I>)−(<I>E<SUB>a</SUB></I>′−<I>E<SUB>e</SUB></I>′).<BR>Here <I>E<SUB>t</SUB></I>−<I>E<SUB>g</SUB></I> is the energy difference between the <I>trans</I> and the <I>gauche</I> isomer of XH<SUB>2</SUB>C–CH<SUB>2</SUB>Y, <I>E<SUB>aa</SUB></I>−<I>E<SUB>ee</SUB></I> is that between the <I>aa</I>- and the <I>ee</I>-isomer of <I>trans</I>-1,2-C<SUB>6</SUB>H<SUB>10</SUB>XY, and <I>E<SUB>a</SUB></I>−<I>E<SUB>e</SUB></I> and <I>E<SUB>a</SUB></I>′−<I>E<SUB>e</SUB></I>′ are those between the <I>a</I>- and the <I>e</I>-isomers of C<SUB>6</SUB>H<SUB>11</SUB>X and C<SUB>6</SUB>H<SUB>11</SUB>Y respectively, where X is a halogen and Y is a halogen or the O–H group.
- 公益社団法人 日本化学会の論文
著者
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Kozima Kunio
Laboratory of Molecular Spectroscopy, Tokyo Institute of Technology
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Takeoka Yoshiko
Laboratory of Molecular Spectroscopy, Tokyo Institute of Technology
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Fujimoto Etsuko
Laboratory of Molecular Spectroscopy, Tokyo Institute of Technology
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