The structure of the molecular ion of C7H8 isomers: an ICR study

✍ Scribed by Michael K. Hoffman; Maurice M. Bursey

• Publisher: Elsevier Science
• Year: 1971
• Tongue: French
• Weight: 171 KB
• Volume: 12
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(01)96913-8

✦ Synopsis

The structure of the molecular ion of C7Hg isomers and the C7H7+ ion which it forms upon decomposition induced by electron impact has been the subject of numerous mass spectral studies."' Extensive d-labeling experiments,3 for example, indicate that toluene undergoes a ring expansion to form the symmetrical tropylium ion either before or concommitant with the expulsion of the hydrogen atom. Carbon-13 labeling studies on the decomposition of the C7H7

• ion4 s5 indicate that skeletal scrambling is also present within addition to hydrogen scrambling.

the system in Although no direct evidence for the structure of the non-decomposing molecular ion (of toluene) may be obtained from conventional mass spectral studies, various proposals have