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The mass spectra of spiro‐alkanones with five‐ and six‐membered rings
Author(s) -
Weringa W. D.
Publication year - 1971
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.1210050905
Subject(s) - fragmentation (computing) , mass spectrum , metastability , chemistry , ion , deuterium , spectral line , high resolution , fragment (logic) , mass spectrometry , analytical chemistry (journal) , crystallography , physics , organic chemistry , atomic physics , mathematics , chromatography , history , archaeology , algorithm , astronomy , computer science , operating system
The mass spectral fragmentations of three spiro‐undecanones and four dispiro‐hexadecanones with six‐membered rings, and of two spiro‐nonanones with five‐membered rings are recorded and discussed. The fragmentation patterns for the spiro[4,4]nonanones and the spiro[5,5]undecanones have been determined by using specific deuterium labelling and in some cases the measurement of metastable transitions by the defocusing technique. The most important fragment ions in the spectra of four dispiro‐hexadecanones could be explained by assuming the same types of fragmentation as found for the monospiro‐ketones. The composition of the fragment ions has been checked by high resolution mass measurements.