A computational scheme of pK a values based on the three-dimensional reference interaction site model self-consistent field theory coupled with the linear fitting correction scheme

A scheme for quantitatively computing the acid dissociation constant, pKa, of hydrated molecules is proposed. It is based on the three-dimensional reference interaction site model self-consistent field (3D-RISM-SCF) theory coupled with the linear fitting correction (LFC) scheme. In LFC/3D-RISM-SCF,...

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Published inPhysical chemistry chemical physics : PCCP Vol. 20; no. 43; p. 27272
Main Authors Fujiki, Ryo, Kasai, Yukako, Seno, Yuki, Matsui, Toru, Shigeta, Yasuteru, Yoshida, Norio, Nakano, Haruyuki
Format Journal Article
LanguageEnglish
Published England 21.11.2018
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Summary:A scheme for quantitatively computing the acid dissociation constant, pKa, of hydrated molecules is proposed. It is based on the three-dimensional reference interaction site model self-consistent field (3D-RISM-SCF) theory coupled with the linear fitting correction (LFC) scheme. In LFC/3D-RISM-SCF, pKa values of target molecules are evaluated using the Gibbs energy difference between the protonated and unprotonated states calculated by 3D-RISM-SCF and the parameters fitted by the LFC scheme to the experimental values of training set systems. The pKa values computed by LFC/3D-RISM-SCF show quantitative agreement with the experimental data.
ISSN:1463-9084
DOI:10.1039/c8cp04354j