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Studies in organic mass spectrometry. Part 25. Benzyl ion formation in chemical ionisation (methane or isobutane) of some ortho ‐alkylhetero‐substituted diphenylcarbinols
Author(s) -
Bongiorno David,
Ceraulo Leopoldo,
Lamartina Liliana,
Concetta Natoli Maria
Publication year - 2000
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(20000229)14:4<203::aid-rcm860>3.0.co;2-k
Subject(s) - isobutane , chemistry , deuterium , methane , protonation , mass spectrometry , ion , chemical ionization , electron ionization , ionization , molecule , photochemistry , organic chemistry , chromatography , catalysis , nuclear physics , physics
Abstract The behaviour of some ortho ‐alkylhetero‐substituted diphenylcarbinols, including deuterium labelled derivatives, under chemical ionisation (methane or isobutane) conditions has been investigated. It has been determined that ortho ‐alkylhetero diphenylmethyl cations formed by water elimination from the protonated molecule undergo consecutive rearrangements which afford benzyl (or tropylium) ions previously observed for ortho ‐substituted diphenylcarbenium ions generated by electron ionisation. This reaction also occurs under low‐energy collision conditions. Copyright © 2000 John Wiley & Sons, Ltd.