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[C7H7]+ and [C6H5]+ fragment ions produced from methylphenol isomers by electron impact

✍ Scribed by Ezzat T. M. Selim; M. A. Fahmey; Hoda S. Ghonime

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
343 KB
Volume
26
Category
Article
ISSN
1076-5174

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✦ Synopsis

Appearance energies for

[ C7H7]+ and [ C,H,I+ fragment ions obtained from methylphenol isomers were measured at the threshold using the electron impact technique. Different processes for the formation of the ions are suggested and discussed. Metastable peaks were detected and the kinetic energies released were determined. The results indicate that [ C7H,]+ ions are formed from methylphenols with both benzyl and tropylium structures, whereas [ C,H,]+ ions are formed with the phenyl structure at the detected thresholds. Kinetic energies released on fragmentation of reactive I C,H7]+ and I CHsl' ions were used as a probe for the structure of the ions at 70 eV.

πŸ“œ SIMILAR VOLUMES

An investigation of the decomposition of
An investigation of the decomposition of the common intermediate ions produced by electron impact. IVβ€”[C6H5CO]+ ions from several alkyl benzoates
✍ Susumu Tajima; Tadashige Azami; Toshikazu Tsuchiya πŸ“‚ Article πŸ“… 1977 πŸ› John Wiley and Sons 🌐 English βš– 338 KB

## The decomposition of the [C&CO]' ions produced from eight abyl benzoates by electron impact has been studied. By calculating the heat of formation of [C6H&O]+ ions from the appearance potential value, it is shown that the ions from C6HSCOOR when R=H, CH,, C,H, have some excess energy, and those