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Electron impact and chemical ionization mass spectra of nitro‐substituted polyfunctional isomers
Author(s) -
Kulkarni P. S.,
Kamath H. V.,
Kulkarni Sheshgiri N.
Publication year - 1984
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.1210190709
Subject(s) - electron ionization , fragmentation (computing) , chemistry , chemical ionization , mass spectrum , nitro , ionization , spectral line , methane , mass spectrometry , medicinal chemistry , photochemistry , organic chemistry , ion , chromatography , alkyl , physics , astronomy , computer science , operating system
The electron impact and methane and ammonia chemical ionization mass spectra of some selected nitro‐substituted isomeric benzalacetophenones, benzyl ketones and aromatic epoxides have been examined. The isomeric pairs show significant differences in the electron impact and chemical ionization spectra. The EI spectra show cleavage α to the carbonyl as the major fragmentation mode. Under CI conditions subtle differences in the fragmentation modes of isomeric pairs are more enhanced, and elimination reactions are more favoured in the o ‐nitro‐substituted compounds than in the para isomers.