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大学・研究所にある論文を検索できる 「Mass-Spectrometric Study on Ion-Molecule Reactions of CH_5＾+, C_2H_5^+, and C_3H_5 with C_8～C_18 1-Alkynes in an Ion Trap」の論文概要。リケラボ論文検索は、全国の大学リポジトリにある学位論文・教授論文を一括検索できる論文検索サービスです。
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Mass-Spectrometric Study on Ion-Molecule Reactions of CH_5＾+, C_2H_5^+, and C_3H_5 with C_8～C_18 1-Alkynes in an Ion Trap

TSUJI, Masaharu 辻, 正治 ツジ, マサハル SATO, Tsukasa 佐藤, 司 サトウ, ツカサ MATSUNAGA, Mika 松永, 美香 マツナガ, ミカ TANAKA, Yuki 田中, 有紀 タナカ, ユウキ ARIKAWA, Takeshi 有川, 健志 アリカワ, タケシ UTO, Keiko 宇都, 慶子 ウト, ケイコ HAYASHI, Jun-Ichiro 林, 潤一郎 ハヤシ, ジュンイチロウ TSUJI, Takeshi 辻, 剛志 ツジ, タケシ 九州大学 DOI:https://doi.org/10.15017/4479146

2021.02

概要

Chemical ionization of 1-alkynes (CxH2x-2: x = 8~18) by the CH5+, C2H5+, and C3H5+ ions has been studied under a reactant-ion selective mode of an ion-trap type of GC/MS. Although no peaks corresponding to [MW + H]+, [MW – H]+, [MW + C2H5]+, [MW + C3H5]+ ions were detected, fragment alkenyl CyH2y-1+ (y ≥ 4) and alkynyl CyH2y-3+ (y ≥ 4) ions were observed. Their initial product-ion distributions were determined by extrapolating the dependence of relative intensities of CyH2y-1+ and CyH2y-3+ ions on the reaction time to zero reaction time. In the CH5+, C2H5+, and C3H5+ reactions, the initial CyH2y-1+ ion distributions had peak at y = 4 and decrease with increasing y, whereas the initial CyH2y-3+ ion distributions gave broad peaks in the y = 5~10 range. On the basis of observed initial distributions and calculated thermochemical data, reaction mechanisms for the formation of alkenyl CyH2y-1+ and alkynyl CyH2y-3+ ions were discussed. In almost all reactions, total intensities of CyH2y-1+ ions were larger than those of CyH2y-3+ ions, indicating that proton transfer reactions are more favorable than hydride-ion abstraction reactions.

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