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Mass spectrometry of pyrylium salts. Free radical evaporation
Author(s) -
Hvistendahl Georg,
Györösi Peter,
Undheim Kjell
Publication year - 1974
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.1210090111
Subject(s) - chemistry , iodide , mass spectrometry , adduct , hydrogen iodide , radical , perchlorate , fluoride , photochemistry , inorganic chemistry , evaporation , ammonium iodide , hydrogen , ion , organic chemistry , chromatography , physics , thermodynamics
From ionisation potential measurements it is shown that 2,4,6‐triphenylpyrylium and thiopyrylium cations are thermally reduced in the mass spectrometer to the corresponding free radicals during evaporation of the bromides, iodides and fluoroborates. For the fluoroborates minor amounts of a fluoride adduct were also present. Perchlorate salts led to oxidation. The gaseous species from 2,6‐diphenyl‐4‐methylpyrylium iodide consists of the anhydro base and hydrogen iodide.