An efficient algorithm for capturing quantum effects in classical reactive scattering: application to D + H +3 → H2D+ + H

Literature Information

Publication Date 2022-12-15
DOI 10.1039/D2CP05108G
Impact Factor 3.676
Authors

Matthew Braunstein, Laurent Bonnet


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Abstract

Motivated by a recent semiclassical analysis of chemical reaction thresholds [Bonnet et al., J. Chem. Phys., 2022, 157, 094114], we present an efficient algorithm for including zero-point energy (ZPE) effects in classical reactive scattering. The algorithm is an extension of the quasi-classical trajectory (QCT) Gaussian binning method. We apply it to the astrophysically important D + H+3 reaction, where there are significant quantum effects and where application of other methods is problematic [Braunstein et al., Phys. Chem. Chem. Phys., 2022, 24, 5489]. The rate constants computed with the new, general algorithm closely match recent Ring Polymer Molecular Dynamics (RPMD) [Bulut et al., J. Phys. Chem. A, 2019, 123, 8766] and experimentally derived [Bowen et al., J. Chem. Phys., 2021, 154, 084307] ones spanning ∼4 orders of magnitude from 70 to 1500 K.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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