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Chemical ionization of cyclopropyl ethers II—the nature of the alkyl group fragmentationt
Author(s) -
Andrist A. Harry,
Slivon Laurence E.,
Wilburn Bruce E.
Publication year - 1976
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.1210111113
Subject(s) - isobutane , chemistry , chemical ionization , alkyl , electron ionization , ionization , ether , medicinal chemistry , ion , methanol , methane , fragmentation (computing) , oxygen , photochemistry , organic chemistry , catalysis , operating system , computer science
Oxygen‐alkyl cleavage is ruled out in the methane chemical ionization‐ and electron mpact‐induced decomposition of cyclopropyl ethers by the finding that for trans,trans ‐2,3‐diethylmethoxycyclopropane the [M C 2 H 5 ·]+ ion is more intense than the [M CH 3 ·]+ ion. The possibility for [M + H C 2 H 6 ] + is discounted by comparison with the methane chemical ionization nass spectrum of tran,tran ‐2,3‐dimethylmethoxycyclopropane. The isobutane chemical ionization nass spectrum of the diethylcyclopropyl methyl ether affords nearly exclusive electrocyclic methanol fragmentation, i.e. [M + H CH 3 OH] + .