Vibration spectra and rotational isomerism of chain molecules. III. Ethyl methyl sulfide and deuterium compounds.
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概要
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The Raman spectra of ethyl methyl sulfide and its three deuterated compounds CD<SUB>3</SUB>SC<SUB>2</SUB>H<SUB>5</SUB>, CH<SUB>3</SUB>SCH<SUB>2</SUB>CD<SUB>3</SUB>, and CH<SUB>3</SUB>SC<SUB>2</SUB>D<SUB>5</SUB> were measured for the liquid and crystalline states. The Raman spectra of the undeuterated species in the gaseous state were measured at different temperatures. The normal vibration frequencies were calculated by using a consistent set of force constants for aliphatic sulfides. The combination of the spectral observations of the deuterated compounds and the normal vibration calculations showed that only the <I>gauche</I> form exists in the crystalline state and the <I>trans</I> and <I>gauche</I> forms coexist in the liquid and gaseous states. The enthalpy difference between the <I>gauche</I> and <I>trans</I> forms in the gaseous state, Δ<I>H</I><SUB>G–T</SUB>, was obtained as −30±50 cal/mol.
- 公益社団法人 日本化学会の論文
著者
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Matsuura Hiroatsu
Department Of Chemistry Faculty Of Science Hiroshima University
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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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Shimanouchi Takehiko
Department of Chemistry, Faculty of Science, The University of Tokyo
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