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Title
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Radical processes in remote charge fragmentations of lithiumcationized long-chain alkenyl salicylic acids
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Author
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Abstract
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| Multistep radical processes are proposed to rationalize the formation of product ions formed by collisionally induced and spontaneous fragmentation of lithium-cationized 6-alkenyl and 6-alkadienyl salicylic acids. An important step in these processes consists of a homolytic C-H cleavage, a mechanism which is consistent with the charge-remote concept. Evidence is given by the observation that the fragmentation of ions formed by the loss of a hydrogen radical is similar to that found for the precursor [M-H+2Li](+) ions. The proposed mechanisms also explain very well the observed enhanced abundances of ions whose formation involves formal benzylic, homobenzylic and homoallylic cleavages. The enhanced abundance of ions whose formation involves formal allylic cleavages can be readily rationalized by resonance stabilization of intermediate allylic radical ions. |
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Language
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English
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Source (journal)
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Biological mass spectrometry. - Chichester, 1991 - 1994
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Publication
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Chichester
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1994
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ISSN
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1052-9306
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DOI
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10.1002/BMS.1200230105
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Volume/pages
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23
(1994)
, p. 20-26
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ISI
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A1994MP05100004
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Full text (Publisher's DOI)
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