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The mass spectra of some O ‐methyloximes of aliphatic aldehydes and ketones
Author(s) -
Middleditch B. S.,
Knights B. A.
Publication year - 1972
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.1210060208
Subject(s) - mass spectrum , chemistry , cyclopropene , ion , branching (polymer chemistry) , polyatomic ion , medicinal chemistry , ketone , organic chemistry , computational chemistry
The mass spectra of O ‐methyloximes of fifteen aliphatic aldehydes and ketones of various molecular weights and degrees of branching have been examined. All give molecular ions, and many of the fragmentations parallel those of aldoximes and ketoximes. The formation of some ions is better explained by the initial production of a novel substituted cyclopropene ion. O ‐Methyloximes of of the long‐chain aldehydes and methyl ketones are readily distinguished by the masses of abundant products of McLafferty rearrangement at m / e 73 and 87, repectively.