Abstract
The gauche–trans isomerization reaction of 1,2-dichloroethane at the liquid–vapor interface of water is studied using molecular-dynamics computer simulations. The solvent bulk and surface effects on the torsional potential of mean force and on barrier recrossing dynamics are computed. The isomerization reaction involves a large change in the electric dipole moment, and as a result the trans/gauche ratio is considerably affected by the transition from the bulk solvent to the surface. Reactive flux correlation function calculations of the reaction rate reveal that deviation from the transition-state theory due to barrier recrossing is greater at the surface than in the bulk water. This suggests that the system exhibits non–Rice–Ramsperger–Kassel–Marcus behavior due to the weak solvent–solute coupling at the water liquid–vapor interface.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 8:32 a.m.) |
Deposited | 1 year, 6 months ago (Feb. 6, 2024, 12:37 a.m.) |
Indexed | 1 year, 3 months ago (May 20, 2024, 5:06 a.m.) |
Issued | 32 years, 7 months ago (Jan. 1, 1993) |
Published | 32 years, 7 months ago (Jan. 1, 1993) |
Published Print | 32 years, 7 months ago (Jan. 1, 1993) |
@article{Benjamin_1993, title={Isomerization reaction dynamics and equilibrium at the liquid–vapor interface of water. A molecular-dynamics study}, volume={98}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.465094}, DOI={10.1063/1.465094}, number={1}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Benjamin, Ilan and Pohorille, Andrew}, year={1993}, month=jan, pages={236–242} }