1. Rotational resonances in the H 2 CO roaming reaction are revealed by detailed correlations
- Author
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Mitchell S. Quinn, Joel M. Bowman, Paul L. Houston, Klaas Nauta, Scott H. Kable, and Meredith J. T. Jordan
- Subjects
Multidisciplinary ,010304 chemical physics ,Hydrogen molecule ,Photodissociation ,010402 general chemistry ,01 natural sciences ,0104 chemical sciences ,chemistry.chemical_compound ,chemistry ,Chemical physics ,Quantum state ,0103 physical sciences ,Potential energy surface ,Roaming ,Carbon monoxide - Abstract
Duality of roaming mechanism in H 2 CO The phenomenon of roaming in chemical reactions (that is, bypassing the minimum energy pathway from unlikely geometries) has attracted a great deal of attention in the chemical reaction dynamics community over the past decade and still demonstrates unexpected results. Using velocity-map imaging of state-selected H 2 products of H 2 CO photodissociation, Quinn et al. discovered the bimodal structure of rotational distribution of the other product fragment, CO. Quasiclassical trajectories showed that this bimodality originates from two distinctive reaction pathways that proceed by the trans or cis configuration of O–C–H⋯H, leading to high or low rotational excitations of CO, respectively. Whether such a mechanism is present in the many other chemical reactions for which roaming reaction pathways have been reported is yet to be determined. Science , this issue p. 1592
- Published
- 2020