Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 3, Pages 2392-2401Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp07142b
Keywords
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Funding
- United State Department of the Air Force
- Swiss National Science Foundation [200021-117810]
- NCCR MUST
- University of Basel
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The NO(X-2 Pi) + N(S-4) reaction which occurs entirely in the triplet manifold of N2O is investigated using quasiclassical trajectories and quantum simulations. Fully-dimensional potential energy surfaces for the (3)A' and (3)A'' states are computed at the MRCI+Q level of theory and are represented using a reproducing kernel Hilbert space. The N-exchange and N-2-formation channels are followed by using the multi-state adiabatic reactive molecular dynamics method. Up to 5000 K these reactions occur predominantly on the N2O (3)A surface. However, for higher temperatures the contributions of the (3)A' and (3)A states are comparable and the final state distributions are far from thermal equilibrium. From the trajectory simulations a new set of thermal rate coefficients of up to 20 000 K is determined. Comparison of the quasiclassical trajectory and quantum simulations shows that a classical description is a good approximation as determined from the final state analysis.
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