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- W1973827393 abstract "Kinetics of the N+H2↔NH+H reaction have been studied using a direct ab initio dynamics method. Potential energy surface for low electronic states have been explored at the QCISD/cc-pVDZ level of theory. We found the ground-state reaction is N(4S)+H2→NH(3Σ−)+H. Thermal rate constants for this reaction were calculated using the microcanonical variational transition state theory. Reaction path information was calculated at the QCISD/cc-pVDZ level of theory. Energies along the minimum energy path (MEP) were then refined at the QCISD(TQ)/cc-pVTZ level of theory. The forward and reverse barriers of the ground-state reaction are predicted to be 29.60 and 0.53 kcal/mol, respectively. The calculated rate constants for both forward and reverse reactions are in good agreement with available experimental data. They can be expressed as k(T)=2.33×1014 exp(−30.83 (kcal/mol)/RT) cm3 mol−1 s−1 for the forward reaction and k(T)=5.55×108T1.44 exp(−0.78(kcal/mol)/RT) cm3 mol−1 s−1 for the reverse reaction in the temperature range 400–2500 K." @default.
- W1973827393 created "2016-06-24" @default.
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- W1973827393 date "2000-10-15" @default.
- W1973827393 modified "2023-09-28" @default.
- W1973827393 title "Direct <i>ab initio</i> dynamics studies of N+H2↔NH+H reaction" @default.
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- W1973827393 doi "https://doi.org/10.1063/1.1308544" @default.
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