Ultrafast tunnel-ionization and electron-rescattering enables femtosecond time-resolved dynamics measurements of the retro-Diels-Alder reactions of positively charged cyclohexene, norbornene, and dicyclopentadiene as they likely occur under electron-ionization mass spectrometry. Unlike the sub-200 fs reaction times that have been observed in the neutral species, on the ionic potential energy surfaces these reactions occur in the picosecond timescale and in some cases exhibit vibrational coherence.

Femtosecond dynamics and coherence of retro-Diels-Alder reactions following electron ionization

ACS Spring Meeting 2021

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