Abstract
In this review article, we present a systematic comparison of the theoretical rate constants for a range of bimolecular reactions that are calculated by using three different classes of theoretical methods: quantum dynamics (QD), quasi-classical trajectory (QCT), and transition state theory (TST) approaches. The study shows that the difference of rate constants between TST results and those of the global dynamics methods (QD and QCT) are seen to be related to a number of factors including the number of degrees-of-freedom (DOF), the density of states at transition state (TS), etc. For reactions with more DOF and higher density of states at the TS, it is found that the rate constants from TST calculations are systematically higher than those obtained from global dynamics calculations, indicating large recrossing effet for these systems. The physical insight of this phenomenon is elucidated in the present review.
Original language | English (US) |
---|---|
Pages (from-to) | 305-316 |
Number of pages | 12 |
Journal | Journal of Computational Chemistry |
Volume | 30 |
Issue number | 2 |
DOIs | |
State | Published - Jan 30 2009 |
Keywords
- PES
- Quantum dynamics
- Quasi-classical trajectory
- Rate constant
- Recrossing
- Transition state theory
ASJC Scopus subject areas
- General Chemistry
- Computational Mathematics