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Issue 6, 2015
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Insights into the bond-selective reaction of Cl + HOD(nOH) → HCl + OD

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Abstract

Bond-selective reaction dynamics of the title reaction is investigated using full-dimensional quantum dynamical (QD) and quasi-classical trajectory (QCT) methods on a newly constructed ab initio global potential energy surface. Both QD and QCT results indicate that excitation of the local OH vibration in the HOD reactant renders the reaction strongly bond selective, with the OD/OH branching ratio in quantitative agreement with the experiment. In addition, the reactivity is found to be greatly enhanced with the reactant vibrational excitation, thanks to the change of a direct rebound mechanism to a capture mechanism. The QCT calculations also yield product state distributions, which show that the HCl product is vibrationally and rotationally hot while the OD co-product is internally cold. The bond selectivity, vibrational enhancement, and product energy disposal are rationalized by the Sudden Vector Projection model.

Graphical abstract: Insights into the bond-selective reaction of Cl + HOD(nOH) → HCl + OD

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Article information


Submitted
07 Nov 2014
Accepted
22 Dec 2014
First published
22 Dec 2014

Phys. Chem. Chem. Phys., 2015,17, 4259-4267
Article type
Paper
Author version available

Insights into the bond-selective reaction of Cl + HOD(nOH) → HCl + OD

J. Li, H. Song and H. Guo, Phys. Chem. Chem. Phys., 2015, 17, 4259
DOI: 10.1039/C4CP05165C

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