Ion-molecule reactions in the binary mixture of acetaldehyde and trioxane. I. Hydrogen atom and proton transfer reactions.
スポンサーリンク
概要
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The formation reactions of protonated molecular ions in acetaldehyde–trioxane mixtures have been studied with a modified time-of-flight mass spectrometer. From the analysis of the fine structure of the ionization efficiency curves of fragment and product ions obtained by means of the retarding potential differential technique using acetaldehyde-<I>d</I><SUB>4</SUB>, the precursors of the product ions were determined. Protonated acetaldehyde is formed by the hydrogen atom transfer reaction of acetaldehyde molecular ion with trioxane, and protonated trioxane by the proton transfer reaction of CHO<SUP>+</SUP> generated from acetaldehyde with trioxane. The rate constants of the formation reactions of the product ions in acetaldehyde (or ace taldehyde-<I>d</I><SUB>4</SUB>)–trioxane mixtures were determined and isotope effect was observed. The CHO<SUP>+</SUP> generated from acetaldehyde participated predominantly in the proton transfer reaction as compared with that generated from trioxane. From the proton transfer reaction involving thermal ion CHO<SUP>+</SUP> generated from acetaldehyde it was found that the proton affinity of trioxane is smaller than that of acetaldehyde.
- 公益社団法人 日本化学会の論文
著者
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Kumakura Minoru
Takasaki Radiation Chemistry Research Establishment Japan Atomic Energy Research Institute
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Arakawa Kazuo
Takasaki Advanced Radiation Research Institute Japan Atomic Energy Agency
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Sugiura Toshio
Japan Atomic Energy Research Institute
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