Protonated combustion products of benzene, toluene and cyclohexane in the flame ionization detector

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/43167

Title: Protonated combustion products of benzene, toluene and cyclohexane in the flame ionization detector
Author(s): McAllister, T.; Scott, J. D.
Abstract: Mass spectra of H2/Ar diffusion flames with benzene additive show that ions of m/z 79, 81, 91 and 95 occur within the flame. Deuteration experiments indicate that these ions have the formulae C6H7+, C6H9+, C7H7O+ and C6H7O+. They also appear in the mass spectra of flames with toluene and cyclohexane additives, but in the ICR mass spectra of H2O/C6H6 mixtures only C6H7+ was found. C6H7+, C6H9+ and C6H7O+ are more prominent early in the flames and their presence may be explained by assuming proton transfer from H3O+ or HCO+ to the unburnt additive or to the initial products of combustion, i.e. benzene, C6H8 and C6H6O (probably phenol), from hydrogen and hydroxyl radical addition and abstraction reactions. C7H7+ is more prominent in the middle of the flame, where C7H6 is presumably formed by reactions of hydrocarbon radicals.
Publication type: Journal article
Research centre: Swinburne College of Technology. Faculty of Applied Science
Source: International Journal of Mass Spectrometry and Ion Physics, Vol. 33, no. 1 (Feb 1980), pp. 63-72
Publication year: 1980
Keyword(s): Abstraction reactions; Proton transfer
Publisher: Elsevier
ISSN: 0020-7381
Publisher URL: http://dx.doi.org/10.1016/0020-7381(80)80035-0
Peer reviewed