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Unusual neutral and radical losses in 2′‐substituted N ‐phenylanthranilic acids on electron impact
Author(s) -
Ramana D. V.,
Srinivas R.,
Mahalakshmi P.
Publication year - 1991
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.1210260423
Subject(s) - anthranilic acid , chemistry , fragmentation (computing) , electron ionization , mass spectrum , ion , deuterium , decomposition , medicinal chemistry , organic chemistry , atomic physics , physics , computer science , ionization , operating system
Unusual expulsions of [H 2 O + CO 2 ] from the M + ˙ of N ‐( o ‐carboxyphenyl)anthranilic acid, [H 2 O + CH 2 O] from the M + ˙ of N ‐( o ‐methoxyphenyl)anthranilic acid and [H 2 O + ˙NO 2 ] from the M + ˙ of N ‐( o ‐nitrophenyl) anthranilic acid were observed under electron impact conditions. These processes are stepwise in the corresponding para ‐substituted N ‐phenylanthranilic acids. The proposed fragmentation pathways and their mechanisms are supported by B / E linked‐scan spectra, collision‐activated decomposition (CAD)–mass‐analysed ion kinetic energy (MIKE) spectra, high‐resolution data, deuterium labelling and chemical substitution.