4.4 Article

Performance of Functionals and Basis Sets in Calculating Redox Potentials of Nitrile Alkenes and Aromatic Molecules using Density Functional Theory

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CHEMISTRYSELECT
卷 8, 期 19, 页码 -

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WILEY-V C H VERLAG GMBH
DOI: 10.1002/slct.202300205

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Redox potentials; Nitrile alkenes; Aromatic compounds; Density Functional Theory

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The performance of different functionals and basis sets in calculating the redox potentials of small organic compounds in acetonitrile has been evaluated. It was found that the redox potentials should be analyzed separately rather than jointly. The M06-2X functional showed a more consistent and uniform response in both reductions and oxidations.
To calculate redox potentials of small organic compounds in acetonitrile, the performance of different functionals and basis sets has been evaluated using density functional theory with the polarized continuum model. Several Pople and Ahlrichs basis sets and functionals at distinct levels of the Jacob's Ladder have been studied: PW91, PBE, M06-L, B3LYP, PBE0, M06-2X, CAM-B3LYP, omega B97X-D3, RI-B2PLYP. It is shown that redox studies should not be done considering oxidation and reduction potentials jointly but analyzing them separately. Functional M06-2X has a more consistent and uniform response both in reductions and oxidations, having an adequate balance between accuracy and computational effort. Linear dependence between the basis set size and the accuracy of the calculated redox potential has not been found.

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