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Conjugated Schiff's bases 16—Substituent effect on electron impact fragmentation of some 1‐oxa‐4‐azabutadienes 1
Author(s) -
Moskal Janusz,
Moskal Alexandra,
Nagraba Krzysztof
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.1210190208
Subject(s) - substituent , fragmentation (computing) , chemistry , electron ionization , dissociation (chemistry) , conjugated system , electron , stereochemistry , physics , organic chemistry , ion , computer science , nuclear physics , polymer , ionization , operating system
The electron impact fragmentation patterns of some 1‐oxa‐4‐azabutadienes have been determined and supported by the corresponding metastables. The effect of substituents on this fragmentation has been investigated. Satisfactory correlation of intensity ratios of the peaks characterizing the primary fragmentation versus the Brown and Okamoto σ + substituent parameters has been found. The relationship between the substituent parameters and the dissociation energy E D,C(3)‐C(5) , estimated with the help of appearance energies has been considered.