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- W2044556556 abstract "L'origine du radical H⋅ éliminé dans la source D'ions à partir de l'ion moléculaire de la méthyl-2 indolizine est étudiée au moyen de quatre variétés marquées au deutérium. La perte de H⋅ intéresse préférentiellement le substituant méthyle, mais les hydrogènes (ou certains des hydrogènes) de chacun des deux cycles interviennent également, particulièrement ceux du cycle substitué. Les résults de l'étude par balayage combiné de l'élimination de HCN à partir des ions métastables [M-H˙]+ sont compatibles avec l'équivalence de tous les hydrogènes de l'ion précurseur vis-à-vis de ce processus, impliquant une réorganisation extensive préalablement à la fragmentation. The origin of the hydrogen radical lost in the ionization chamber from the molecular ion of 2-methylindolizine has been studdied by examination of the spectra of four specifically deuterated species. Hydrogen loss involves preferentially a hydrogen from the methyl substituent but also one of the hydrogens of either ring, especially those of the 5-membered ring. The HCN elimination from the metastable [MH˙]+ ions was studied using a linked scan method; the results are consistent with loss of identity of all the hydrogen atoms of the precursor ion, which implies an extensive reorganization prior to fragmentation." @default.
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- W2044556556 date "1979-09-01" @default.
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- W2044556556 title "Fragmentation de la Méthyl-2 Indolizine sous Impact Electronique: perte de H˙ à partir de l'Ion Moléculaire; perte de HCN à partir de l'Ion [MH˙]+" @default.
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- W2044556556 doi "https://doi.org/10.1002/oms.1210140906" @default.
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