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Mass spectrometry of heterocyclic compounds. VII —Evidence for common structure(s) of 1,2‐benzisothiazole and benzothiazole molecular ions produced by electron‐impact
Author(s) -
Selva Antonio,
Vettori Umberto,
Gaetani Enrico
Publication year - 1974
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.1210091202
Subject(s) - benzothiazole , metastability , ion , chemistry , mass spectrometry , mass spectrum , kinetic energy , decomposition , electron ionization , crystallography , organic chemistry , physics , chromatography , quantum mechanics , ionization
1,2‐Benzisothiazole and benzothiazole ion kinetic energy spectra, and metastable ion relative abundances of the same primary and secondary decomposition processes are compared. The results are interpretable as postulating slow (metastable) process(es) involving common structures and fast process(es)which are structurally dependent. Analogous indications are given by the interring H/D scrambling data, preceding the loss of DCN (or HCN) from 1,2‐benzisothiazole‐3‐ d 1 and benzothiazole‐2‐ d 1 molecular ions, measured in either metastable or normal daughter ions at various electron beam energies.