| Abstrakt: |
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 [C6H5]+, [C6H5NH3·(NH3) m]+ ( m = 0, 1) and [C6H5CONH3·(NH3) n]+ ( n = 0, 1, 2, 3) and the odd-electron ions [C6H4NH3·(NH3) 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. [ABSTRACT FROM AUTHOR] |
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