TOLUENIUM AND OTHER GASEOUS METHYLBENZENIUM IONS: COMPLEX INTERPLAY OF PROTONATED ARENES AND CYCLO-OLEFINS.
作者： Dietmar Kuck
DOI: 10.1002/MAS.21631
关键词:
摘要: The development of the current knowledge gas-phase chemistry protonated methylbenzenes, such as toluenium, xylenium and mesitylenium ions, their higher congeners well mostly cyclo-olefinic isomers by mass spectrometric methodology is presented. Starting from observation characteristic expulsion dihydrogen metastable C7 H9+ which associated with release large amounts kinetic energy, composite C- H-scrambling prior to loss methane, in particular, insights into isomerization scenario various isomeric , C8 H11+ C9 H13+ based on a variety independent techniques, are discussed. Besides isotope labeling ion methodology, these include flowing afterglow spectrometry, titration infrared spectroscopy mass-selected ions. particularly complex energy hypersurface isomerizing fragmenting toluenium has been elaborated reports over years, presented combined way assess role cycloheptatriene, norbornadiene, 6-methylfulvene number further isomers. formation nature ions generated fragmentation hydrocarbon precursors, monoterpenes adamantane, also addressed. contribution multiphoton dissociation (IRMPD) and tagged-ion photodissociation (IRPD) gaseous compared wealth previous understanding commented well. Finally, remarkable parallels methylbenzenium species within cavities acidic zeolite catalysts course industrially important methanol-to-hydrocarbon reaction © 2020 John Wiley & Sons Ltd. Mass Spec Rev.
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