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Reaction of ammonia with accelerated benzoyl ions under multiple‐collison conditions in a triple quadrupole instrument
Author(s) -
White Earl L.,
Tabet JeanClaude,
Bursey Maurice M.
Publication year - 1987
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.1210220304
Subject(s) - endothermic process , exothermic reaction , chemistry , ion , ammonia , triple quadrupole mass spectrometer , mass spectrometry , kinetic energy , quadrupole , analytical chemistry (journal) , mass spectrum , atomic physics , tandem mass spectrometry , physics , adsorption , selected reaction monitoring , organic chemistry , chromatography , quantum mechanics
The reaction of benzoyl ion with ammonia in multiple‐collision conditions in the second quadrupole assembly of a triple quadrupole mass spectrometer at (laboratory) ion kinetic energies from 0 to 20 eV produced the even‐electron ions [C 6 H 5 ] + , [C 6 H 5 NH 3 ·(NH 3 ) m ] + ( m = 0, 1) and [C 6 H 5 CONH 3 ·(NH 3 ) n ] + ( n = 0, 1, 2, 3) and the odd‐electron ions [C 6 H 4 NH 3 ·(NH 3 ) p ] + · ( p = 0, 1). Thermochemical information could not be obtained under multiple‐collision conditions: both exothermic and endothermic reactions were observed, with no translational‐energy onset measurable for the endothermic processes, nor decrease in the yield of the exothermic processes at high energies. The behaviour of cluster‐ion intensities as pressure varied was qualitatively as expected. There are pressure and energy regions where spectra change little; if this feature were to be general, it would point to some utility for these conditions in qualitative analysis.