Issue 7, 2024

Machine learning from quantum chemistry to predict experimental solvent effects on reaction rates

Abstract

Fast and accurate prediction of solvent effects on reaction rates are crucial for kinetic modeling, chemical process design, and high-throughput solvent screening. Despite the recent advance in machine learning, a scarcity of reliable data has hindered the development of predictive models that are generalizable for diverse reactions and solvents. In this work, we generate a large set of data with the COSMO-RS method for over 28 000 neutral reactions and 295 solvents and train a machine learning model to predict the solvation free energy and solvation enthalpy of activation (ΔΔGsolv, ΔΔHsolv) for a solution phase reaction. On unseen reactions, the model achieves mean absolute errors of 0.71 and 1.03 kcal mol−1 for ΔΔGsolv and ΔΔHsolv, respectively, relative to the COSMO-RS calculations. The model also provides reliable predictions of relative rate constants within a factor of 4 when tested on experimental data. The presented model can provide nearly instantaneous predictions of kinetic solvent effects or relative rate constants for a broad range of neutral closed-shell or free radical reactions and solvents only based on atom-mapped reaction SMILES and solvent SMILES strings.

Graphical abstract: Machine learning from quantum chemistry to predict experimental solvent effects on reaction rates

Supplementary files

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Article information

Article type
Edge Article
Submitted
10 oct. 2023
Accepted
04 janv. 2024
First published
10 janv. 2024
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2024,15, 2410-2424

Machine learning from quantum chemistry to predict experimental solvent effects on reaction rates

Y. Chung and W. H. Green, Chem. Sci., 2024, 15, 2410 DOI: 10.1039/D3SC05353A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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