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The mass spectrometry of 1,3,4‐thiadiazolines
Author(s) -
Wolkoff Peder,
Hammerum Steen
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.1210090205
Subject(s) - chemistry , fragmentation (computing) , substituent , ion , mass spectrum , radical , cycloaddition , mass spectrometry , medicinal chemistry , photochemistry , computational chemistry , organic chemistry , catalysis , chromatography , computer science , operating system
The mass spectra of di‐, tri‐ and tetraaryl substituted 1,3,4‐thiadiazolines have been examined. They are characterized by thiadiazolium ions, formed by elimination of a C‐5 substituent, by ions formed through elimination of C 6 H 5 S˙ radicals arising by transannular phenyl migration and by ions generated via elimination of thiocarbonyl neutrals in retro‐1,3‐dipolar cycloaddition reactions. The influence of the stability of the dipolarophile on the latter reaction is discussed and the fragmentation reactions of thiadiazolines and oxadiazolines are compared.