Vibration spectra and rotational isomerism of chain molecules. I. Methyl propyl ether, ethyl propyl ether, and butyl methyl ether.
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概要
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The Raman and infrared spectra of methyl propyl ether, ethyl propyl ether, and butyl methyl ether were measured for the gaseous, liquid, glassy and crystalline states. The normal vibration frequencies were calculated, a consistent set of force constants explaining the frequencies of basic aliphatic ethers being assumed. The rotational isomerism was studied and the following conclusions were obtained. (1) Only the all-<I>trans</I> form exists in the crystalline state. (2) Another form which takes the <I>gauche</I> conformation about the OC–CC axis and the <I>trans</I> conformation about the CC–CC and CO–CC axes exists in the glassy state. (3) Other forms also exist in the liquid state. These results confirmed that the repulsive force between nonbonded hydrogen atoms was one of the important factors influencing the stability of molecular conformations. The stable conformations of the ether molecules were correlated with those of polyether chains.
- 公益社団法人 日本化学会の論文
著者
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Ohta Masahiro
Department Of Cardiology Mie University Graduate School Of Medicine
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Matsuura Hiroatsu
Department Of Chemistry Faculty Of Science Hiroshima University
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Shimanouchi Takehiko
Department of Chemistry, Faculty of Science, University of Tokyo
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Ohta Masahiro
Department of Chemistry, Faculty of Science, University of Tokyo
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Ogawa Yoshiki
Department of Chemistry, Faculty of Science, University of Tokyo
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Harada Issei
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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Shimanouchi Takehiko
Department of Chemistry, Faculty of Science, The University of Tokyo
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