Vibrational spectra and rotational isomerism of alkyl vinyl ethers.
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概要
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The rotational isomerism of methyl vinyl ether, ethyl vinyl ether, and <I>n</I>-butyl vinyl ether has been studied by means of the vibrational spectra and normal frequency calculations. The enthalpy difference between the <I>skew</I> and <I>cis</I> isomers in the liquid state of methyl vinyl ether has been determined to be 1440±160 cal/mol. Series of C–O torsional transitions in the <I>cis</I> well have been observed for methyl vinyl ether and methy-<I>d</I><SUB>3</SUB> vinyl ether in the region near 230 cm<SUP>−1</SUP> and analyzed. It has been concluded for ethyl vinyl ether that the <I>cis-trans</I> form (CT) is stable in the solid state and that three forms, CT, SG′, and ST, coexist in the liquid and gaseous states. The spectra in the solid state of <I>n</I>-butyl vinyl ether are consistent with the calculated frequencies of the CTTT form.
- 公益社団法人 日本化学会の論文
著者
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Sakakibara Masaaki
Department of Chemistry, Faculty of Science, University of Tokyo
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Harada Issei
Department of Chemistry, Faculty of Science, The University of Tokyo
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Inagaki Fuyuhiko
Department of Biophysics and Biochemistry, Faculty of Science, The University of Tokyo
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Shimanouchi Takehiko
Department of Chemistry, Faculty of Science, The University of Tokyo
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