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Electron impact mass spectra of 5,5‐bis(carboethoxy)‐1,3‐dioxanes
Author(s) -
Horn Mihai,
Mager Sorin,
Palibroda Nicolae,
Culea Monica
Publication year - 1991
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.1210260707
Subject(s) - moiety , chemistry , mass spectrum , substituent , electron ionization , ion , metastability , mass , ring (chemistry) , polyatomic ion , stereochemistry , medicinal chemistry , cleavage (geology) , organic chemistry , materials science , ionization , fracture (geology) , composite material
Electron impact‐induced fragmentations of 2‐substituted 5,5‐bis(carboethoxy)‐l,3‐dioxanes were studied by exact mass measurements and metastable ion analysis. The substituent R on C(2) of the heterocyclic ring has little influence on the principal cleavage reactions. Elimination of CH 2 O/CO and C 2 H 4 O/C 2 H 4 /C 2 H 5 OH are common fragmentations for ions containing the 1,3‐dioxane moiety or the OC 2 H 5 group, respectively. The abundant ions at m / z 173 and 127 serve as structural probes for the class of compounds studied. Primary fragmentations implying the ester function are of little importance.