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Electron impact induced fragmentation of tetramethyl‐substituted dibenzo‐18‐crown‐6 ethers
Author(s) -
Lockhart J. C.
Publication year - 1982
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.1210171111
Subject(s) - fragmentation (computing) , substituent , electron ionization , chemistry , deuterium , molecule , ion , mass spectrometry , labelling , mass spectrum , polyatomic ion , ether , stereochemistry , computational chemistry , crystallography , organic chemistry , nuclear physics , ionization , physics , biochemistry , chromatography , computer science , operating system
A series of tetramethyldibenzo‐18‐crown‐6 molecules with methyl substituents on the ether ring has been subjected to electron impact mass spectrometry, and from the variation of the fragmentation pattern with substituent position, certain fragmentation processes are located and the composition and origin of certain fragment ions can be deduced. The aliphatic CC fission deduced from deuterium labelling studies of benzo‐15‐crown‐5 is not an observable process for the crowns reported here.