title: Electron impact fragmentation mechanisms of some cyclic esters with helical structures
abstract: The electron impact mass spectra of several cyclic esters with helical structures have been studied. Their fragmentation pathways were proposed and confirmed by mass-analyzed ion kinetic energy (MIKE) and high-resolution data. In general, the dominant fragmentation pathways in the spectra of these compounds originate from a alpha-cleavage with loss of a hydrogen or methyl group. The difference between hydrogen and methyl group loss greatly affects the subsequent fragmentations. Although, due to their helicity, these cyclic esters are optically active no stereo-related fragmentation pathway was observed. Copyright 2000 John Wiley & Sons, Ltd.
authors: Department of Chemistry, Peking University, Beijing 100871, China.
authors: J
authors: He
authors: A
authors: Nie
authors: M
authors: He
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authors: He
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authors: Yu
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authors: Ye
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authors: Xing