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Ionization and dissociation of cyclic ethers and thioethers by electron‐impact. A comparison between 1,3‐dioxolane, 1,3‐dithiolane and 1,3‐oxathiolane
Author(s) -
CondeCaprace G.,
Collin J. E.
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.1210060407
Subject(s) - dioxolane , fragmentation (computing) , electron ionization , dithiolane , chemistry , dissociation (chemistry) , ion , ionization , mass spectrum , electron , sulfur , mass spectrometry , electron capture , photochemistry , analytical chemistry (journal) , medicinal chemistry , organic chemistry , physics , chromatography , computer science , operating system , quantum mechanics
The various modes of fragmentation of 1,3‐dithiolane and 1,3‐oxathiolane under electron‐impact have been discussed on the basis of the variation of their mass spectra with electron energy, the high resolution analysis and the AP's of the main ions. They are shown to be similar in both compounds, but considerably different from those of 1,3 dioxolane. From the AP of the [C 2 H 5 S] + ion in 1,3‐dithiolane, a heat of formation of 63 kcal/mol for the free radical CHS is obtained.