The Microwave Spectrum, the <I>r</I><SUB>s</SUB> Structure and the Dipole Moment of the <I>TT</I> Isomer of Diethyl Ether
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概要
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The microwave spectra of six isotopic species of diethyl ether were measured in relation to the molecular form and dipole moment. Transitions of the <I>TT</I>(<I>trans</I>-<I>trans</I>) isomer could be assigned and the <I>r</I><SUB>s</SUB> structure of this isomer was obtained by the substitution method. The structural parameters of the <I>TT</I> isomer of diethyl ether are; <I>r</I>(CO) 1.408 Å, <I>r</I>(CC) 1.516 Å; α(COC) 112°25′, α(OCC) 108°37′ for the skeleton; <I>r</I>(CH) 1.093 Å, α(CCH) 110°11′, α(OCH) 110°10′, α(HCH) 107°29′ for the CH<SUB>2</SUB> group and <I>r</I>(CH) 1.090 Å, α(CCH<SUB>s</SUB>) 110°35′, α(CCH<SUB>a</SUB>) 110°15′, α(H<SUB>s</SUB>CH<SUB>a</SUB>) 108°48′, α(H<SUB>a</SUB>CH<SUB>a</SUB>) 108°4′ for the CH<SUB>3</SUB> group. The dipole moment was determined to be 1.061±0.018 D from the Stark effect measurement for the <I>TT</I> isomer. A discussion was made on the structure and the dipole moment of the <I>TT</I> isomer of diethyl ether in comparison with those of the similar molecules.
- 公益社団法人 日本化学会の論文
著者
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Hayashi Michiro
Department of Chemistry, Faculty of Science, Hiroshima University
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Kuwada Kazunori
Department of Chemistry, Faculty of Science, Hiroshima University
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