A Study of Charge Separation and Electron Capture Induced Decomposition of Benzoylamide Doubly Charged Ions

The charge separation and electron capture induced decomposition reactions of doubly charged C₇H₇NO⁺⁺, C₇H₅O⁺⁺ and C₆H₇N⁺⁺ ions produced in the ion source by electron impact from benzoylamide were studied in the present work. The transition states were discussed in detail according to the kinetic energy releases in the charge separation processes and the intercharge distances in the transition states. Two kinds of structures were postulated for C₇H₇NO⁺⁺ ion. The metastable ion is of a quinonoid stucture due to the amino rearrangement, otherwise, the stable ion is of a structure like the corresponding singly charged ion C₇H₇NO⁺. The structural identity of C₆H₇N⁺⁺ from benzoylamide and aniline, respectively, was also discussed. In ECID spectra, the favourable reaction channels were the neutral losses containing O and N atoms. The ECID reaction is independent of the target gas pressure in a certain target gas pressure range.