An investigation of the decomposition of the intermediate ions produced by electron-impact. II—[C7H7]+ ions from several halogenotoluenes

Autor:	Susumu Tajima, Toshikazu Tsuchiya
Rok vydání:	1974
Předmět:	Chlorotoluene Abundance (chemistry) Chemistry Analytical chemistry Biochemistry Decomposition Standard enthalpy of formation Ion Metastability Molecular Medicine Qualitative inorganic analysis Instrumentation Spectroscopy Electron ionization
Zdroj:	Organic Mass Spectrometry. 9:265-273
ISSN:	1096-9888 0030-493X
Popis:	The structure and decomposition of the [C7H7]+ ions produced by electron-impact from o-, m- and p-chlorotoluene, o-, m- and p-bromotoluence, and p-iodotoluence, have been investigated. By determining the relative abundance of normal and metastable ions, these [C7H7]+ ions at electron energy of 20 eV are shown to be so-called ‘tropylium ions’. The amount of the internal energy of the [C7H7]+ ion estimated by the relative ion abundance ratios, † [C5H5]+/[C7H7]+ and m*/[C7H7]+ for the decomposition , is in the order iodotoluene > bromotoluene > chlorotoluene. The heats of formation of the activated complexes for the reaction were estimated. The values suggest that the decomposing [C7H7]+ ions from various halogenotoluenes are identical in structure.
Databáze:	OpenAIRE
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