Bicyclic oxonium ions with an oxygen bridgehead.

Autor: Van de Sanded, C. C., Vanhooren, M., Van Gaever, F.
Zdroj: Organic Mass Spectrometry; 1976, Vol. 11 Issue 11, p1206-1212, 7p
Abstrakt: Electron impact induced fragmentation of 4-(ω-phenoxymethyl and -ethyl)tetrahydn pyranes results in abundant [M  93] + ions through loss of a phenoxy radical. These ions are all produced in high yields by isobutane chemical ionization through loss of phenol from the quai molecular ions. Labelling data (2H, 13C) provide evidence for the l-oxoniabicyclo[2.2.1]heptane ai l-oxoniabicyclo[2.2.2]octane structures of the electron impact produced decomposing (ion sour and first field free region) ions [M  93]L in the case of the methyl and ethyl compounds, respective. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index