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Keywords:

  • carbocations;
  • gas-phase reactions;
  • IR spectroscopy;
  • photodissociation;
  • structure elucidation
Thumbnail image of graphical abstract

Definitely different: The path towards sorting out a long-standing dichotomy in carbocation chemistry is disclosed by infrared multiple photon dissociation spectroscopy of tropylium and benzylium isomers of C8H9+ ions (see picture).