Reactivity oscillation in the heavy-light-heavy Cl + CH<sub>4</sub> reaction.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 32277024.
- Also identified by DOI 10.1073/pnas.1917618117 and PMC identifier 7196785.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
It has long been predicted that oscillatory behavior exists in reactivity as a function of collision energy for heavy-light-heavy (HLH) chemical reactions in which a light atom is transferred between two heavy atoms or groups of atoms, but direct observation of such a behavior in bimolecular reactions remains a challenge. Here we report a joint theoretical and crossed-molecular-beam study on the Cl + CH<sub>4</sub> → HCl + CH<sub>3</sub> reaction. A distinctive peak at a collision energy of 0.15 eV for the CH<sub>3</sub>(<i>v</i> = 0) product was experimentally detected in the backward scattering direction. Detailed quantum-dynamics calculations on a highly accurate potential energy surface revealed that this feature originates from the reactivity oscillation in this HLH polyatomic reaction. We anticipate that such reactivity oscillations exist in many HLH reactions involving polyatomic reagents.