Mechanisms and dynamics of reactions involving entropic intermediates

Z Yang, CS Jamieson, XS Xue, M Garcia-Borràs… - Trends in Chemistry, 2019 - cell.com
An entropic intermediate is defined as a free energy minimum that is not a potential energy
minimum; the favorable entropy in this region of the potential surface is responsible for the …

Atmospheric chemistry of Criegee intermediates: Unimolecular reactions and reactions with water

B Long, JL Bao, DG Truhlar - Journal of the American Chemical …, 2016 - ACS Publications
Criegee intermediates are produced in the ozonolysis of unsaturated hydrocarbons in the
troposphere, and understanding their fate is a prerequisite to modeling climate-controlling …

New pathways for formation of acids and carbonyl products in low-temperature oxidation: The Korcek decomposition of γ-ketohydroperoxides

A Jalan, IM Alecu, R Meana-Pañeda… - Journal of the …, 2013 - ACS Publications
We present new reaction pathways relevant to low-temperature oxidation in gaseous and
condensed phases. The new pathways originate from γ-ketohydroperoxides (KHP), which …

Multi-path variational transition state theory for chiral molecules: the site-dependent kinetics for abstraction of hydrogen from 2-butanol by hydroperoxyl radical …

JL Bao, R Meana-Pañeda, DG Truhlar - Chemical science, 2015 - pubs.rsc.org
The goal of the present work is modeling the kinetics of a key reaction involved in the
combustion of the biofuel 2-butanol. To accomplish this we extended multi-path variational …

The VENUS/NWChem software package. Tight coupling between chemical dynamics simulations and electronic structure theory

U Lourderaj, R Sun, SC Kohale, GL Barnes… - Computer Physics …, 2014 - Elsevier
The interface for VENUS and NWChem, and the resulting software package for direct
dynamics simulations are described. The coupling of the two codes is considered to be a …

Kinetics of hydrogen radical reactions with toluene including chemical activation theory employing system-specific quantum RRK theory calibrated by variational …

JL Bao, J Zheng, DG Truhlar - Journal of the American Chemical …, 2016 - ACS Publications
Pressure-dependent reactions are ubiquitous in combustion and atmospheric chemistry. We
employ a new calibration procedure for quantum Rice–Ramsperger–Kassel (QRRK) …

A practical implementation of semi-classical transition state theory for polyatomics

TL Nguyen, JF Stanton, JR Barker - Chemical Physics Letters, 2010 - Elsevier
An algorithm is described for computing rate constants with semi-classical transition state
theory (SCTST) formulated by Miller and coworkers. SCTST incorporates non-separable …

Entropic intermediates and hidden rate-limiting steps in seemingly concerted cycloadditions. Observation, prediction, and origin of an isotope effect on recrossing

OM Gonzalez-James, EE Kwan… - Journal of the American …, 2012 - ACS Publications
An unusual intramolecular kinetic isotope effect (KIE) in the reaction of dichloroketene with
cis-2-butene does not fit with a simple asynchronous cycloaddition transition state, but it can …

Heavy‐Atom Tunneling Calculations in Thirteen Organic Reactions: Tunneling Contributions are Substantial, and Bell's Formula Closely Approximates …

C Doubleday, R Armas, D Walker… - Angewandte …, 2017 - Wiley Online Library
Multidimensional tunneling calculations are carried out for 13 reactions, to test the scope of
heavy‐atom tunneling in organic chemistry, and to check the accuracy of one‐dimensional …

Impact of tunneling on hydrogen-migration of the n-propylperoxy radical

F Zhang, TS Dibble - Physical Chemistry Chemical Physics, 2011 - pubs.rsc.org
The kinetics of three unimolecular reactions of the n-propylperoxy radical were studied by
canonical variational transition state theory and multidimensional small curvature tunneling …