AbstractMetastable (3‐phenyl‐2‐propynyl)benzenium ions, generated by electron impact induced fragmentation from the appropriately substituted 1,4‐dihydrobenzoic acid, react by loss of ˙CH3 and C6H6. The study of deuterated derivatives reveals that hydrogen/deuterium exchanges involving all hydrogen and deuterium atoms precede the fragmentations. The results suggest a skeletal rearrangement by electrophilic ring‐closure reactions giving rise to protonated phenylindene and protonated 9,10‐methano‐9,10‐dihydroanthracene prior to the elimination of C6H6 and ˙CH3, respectively. A study of isomeric [C15H13]+ ions by collision‐induced decomposition and by deuterium labelling shows that these ions interconvert by hydrogen migrations and skeletal rearrangements.
Wieland, Chemische Berichte, 1904, vol. 37, p. 1146
作者:Wieland
DOI:——
日期:——
Maffei et al., Annali di Chimica, 1956, vol. 46, p. 604,606