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- W2123669652 abstract "Fragmentation of the pyridine ring upon K-shell excitation/ionization has been studied with gaseous 2-, 3- and 4-methylpyridine by the electron-impact method. Ab initio molecular orbital (MO) calculations were also carried out to explore electronic states correlating with specific fragments. Some specific fragmentation channels were identified from the ionic fragments enhanced characteristically at the N 1s edge. Yields of the C2HN+ and C5H5+/C5H6+ ions show that the fission of the NC2 and C4C5/C5C6 bonds of the ring is likely to occur after the N 1s excitation and ionization. Ab initio MO calculations for the 2-methylpyridine molecule indicate that the dissociation channels to produce these ions are only accessible through the excited states of the parent molecular dication, which can be formed by Auger decays after the N 1s ionization. Fragment ions via hydrogen rearrangement are produced as well, but the rearrangement is not a phenomenon specific to the K-shell excitation/ionization. Copyright © 2010 John Wiley & Sons, Ltd." @default.
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- W2123669652 date "2010-03-01" @default.
- W2123669652 modified "2023-10-16" @default.
- W2123669652 title "Specific fragmentation of the K-shell excited/ionized pyridine derivatives studied by electron impact: 2-, 3- and 4-methylpyridine" @default.
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- W2123669652 doi "https://doi.org/10.1002/jms.1717" @default.
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