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The loss of SO 2 H from an imido‐sulfite under electron impact: Structural elucidation by collision activation of the resulting fragment
Author(s) -
Puzo Germain,
Promé JeanClaude,
Zedde Chantal,
Cazaux Louis
Publication year - 1981
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210160910
Subject(s) - sulfite , chemistry , ion , mass spectrum , metastability , polyatomic ion , electron ionization , spectral line , fragment (logic) , crystallography , stereochemistry , inorganic chemistry , organic chemistry , physics , astronomy , computer science , programming language , ionization
Electron impact mass spectrometry of an imido‐sulfite 5,6‐benzo‐2‐imino‐ N ‐(2,4,6‐trichlorophenyl)‐1,3‐dioxa‐2‐thiacycloheptane shows an intense fragment ion corresponding to the expulsion of SO 2 H from the molecular ion. A mechanism that requires a rearrangement of the molecular ion is proposed. Structural elucidation of the [MSO 2 H] + ion was obtained by recording its metastable ion and collisional activation spectra. Comparison of these spectra with similar spectra recorded from a precursor ion of known structure demonstrated that they were identical. Thus, the results support the proposed structure which derives from the expulsion of SO 2 H from the molecular ion of the compound 5,6‐benzo‐2‐imino‐ N ‐(2,4,6‐trichlorophenyl)‐1,3‐dioxa‐2‐thiacycloheptane.