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Mass spectra of substituted Δ 2 ‐1,2,4‐oxadiazolines—I
Author(s) -
Srivastava R. M.
Publication year - 1978
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.1210130104
Subject(s) - fragmentation (computing) , substituent , alkyl , ion , mass spectrum , chemistry , electron ionization , high resolution , mass spectrometry , spectral line , computational chemistry , stereochemistry , physics , organic chemistry , computer science , remote sensing , chromatography , ionization , geology , operating system , astronomy
The electron impact fragmentation of four Δ 2 ‐1,2,4‐oxadiazolines with substituents at positions 3 and 5 has been examined. The direct analysis of daughter ions and high resolution mass measurements provided valuable information regarding certain ions. The present study clearly demonstrates that the substitution of phenyl or a substituted phenyl group for alkyl at C‐3 and alkyl in place of a phenyl substituent at C‐5 in the oxadiazoline system alters the fragmentation modes considerably.