Electron impact fragmentation mechanisms of some cyclic esters with helical structures
✍ Scribed by Jiangtao He; Aihua Nie; Meiyu He; Xiaoran He; Zhenpei Yu; Xiulin Ye; Qiyi Xing
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 79 KB
- Volume
- 14
- Category
- Article
- ISSN
- 0951-4198
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✦ Synopsis
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 a-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.