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Effects of pressure on ion‐molecule reactions in the chemical ionization mass spectrometry of carboxylic acids
Author(s) -
Grønneberg Truls
Publication year - 1977
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.1210121213
Subject(s) - protonation , chemistry , bifunctional , molecule , mass spectrometry , ion , photochemistry , chemical ionization , ionization , dicarboxylic acid , computational chemistry , organic chemistry , chromatography , catalysis
The water elimination caused by bifunctional interaction in protonated dicarboxylic acids diminishes as sample pressure increases. This appears to be the result of stabilization of the protonated dixarboxylic acid by reversible formation of a protonted dimmer. The effect reaches a minimum for dicarboxylic acid with interfunctional chain length of 6–9 carbons where the free energy of activation probably also reaches a minimum. Self‐acetylation by water elimination from protonated dimers was observed for the monocarboxylic acids only.