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Mechanism of formation of doubly charged fragments from bis‐benzyltetrahydroisoquinolines under electron impact
Author(s) -
Bel Peter,
Mandelbaum Asher
Publication year - 1980
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.1210151105
Subject(s) - heterolysis , ion , chemistry , substituent , electron ionization , metastability , cleavage (geology) , ionization , electron , photochemistry , crystallography , stereochemistry , materials science , organic chemistry , physics , catalysis , quantum mechanics , fracture (geology) , composite material
Some bis‐benzyltetrahydroisoquinolines [α,α′‐di‐ N,N ‐(1‐benzyl‐1,2,3,4‐tetrahydroisoquinoline)‐ p ‐xylene and various substituted analogues] give rise to very abundant doubly charged fragment ions under electron impact, corresponding to the loss of the two benzyl groups. Substituent effects, ionization and appearance energy measurements and metastable transitions show that these doubly charged ions are formed (at least in part) from singly charged precursors by a heterolytic cleavage (charge separation).