| 13 | Specific Mass Spectrometric Fragmentations from the Dissociation of Intermediate Ion-Neutral Complexes显示文摘It is reported that two kinds of specific mass spectrometric fragmentations are generated from dissociations of the intermediates of both the ion-neutral complex and the proton-bound complex. Collision-induced dissociation, isotopic labelling. and semi-empirical AMI calculations were used to investigate the formation mechanism of the ion of m/z 139 from ionized tetrahydroimidazole-substituted methylene β-diketones and the unimolecular fragmentations pathway of 3-phenyl-1-butyn-3-of upon electron impact. | She, YM Wei, JH Tu, YP Liu, SY | 1998 | Chinese Chemical Letters1998，9，1： | 0 |
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