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Klamt A, Eckert F, Diedenhofen M, Beck ME. First Principles Calculations of Aqueous pKa Values for Organic and Inorganic Acids Using COSMO-RS Reveal an Inconsistency in the Slope of the pKa Scale. J Phys Chem A 2015; 107:9380-6. [PMID: 26313337 DOI: 10.1021/jp034688o] [Citation(s) in RCA: 216] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The COSMO-RS method, a combination of the quantum chemical dielectric continuum solvation model COSMO with a statistical thermodynamics treatment for more realistic solvation (RS) simulations, has been used for the direct prediction of pKa constants of a large variety of 64 organic and inorganic acids. A highly significant correlation of r(2) = 0.984 with a standard deviation of only 0.49 between the calculated values of the free energies of dissociation and the experimental pKa values was found, without any special adjustment of the method. Thus, we have a theoretical a priori prediction method for pKa, which has the regression constant and the slope as only adjusted parameters. Such a method can be of great value in many areas of physical chemistry, especially in pharmaceutical and agrochemical industry. To our surprise, the slope of pKa vs ΔGdiss is only 58% of the theoretically expected value of 1/RTln(10). A careful analysis with respect to different contributions as well as a comparison with the work of other authors excludes the possibility that the discrepancy is due to weaknesses of the calculation method. Hence, we must conclude that the experimental pKa scale depends differently on the free energy of dissociation than generally assumed.
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Affiliation(s)
- Andreas Klamt
- COSMOlogic GmbH&COKG, Burscheider Str. 515, 51381 Leverkusen, Germany.,Bayer Cropscience, BCS-R-SCLA, Alfred-Nobel-Str. 50, 40789 Monheim, Germany
| | - Frank Eckert
- COSMOlogic GmbH&COKG, Burscheider Str. 515, 51381 Leverkusen, Germany.,Bayer Cropscience, BCS-R-SCLA, Alfred-Nobel-Str. 50, 40789 Monheim, Germany
| | - Michael Diedenhofen
- COSMOlogic GmbH&COKG, Burscheider Str. 515, 51381 Leverkusen, Germany.,Bayer Cropscience, BCS-R-SCLA, Alfred-Nobel-Str. 50, 40789 Monheim, Germany
| | - Michael E Beck
- COSMOlogic GmbH&COKG, Burscheider Str. 515, 51381 Leverkusen, Germany.,Bayer Cropscience, BCS-R-SCLA, Alfred-Nobel-Str. 50, 40789 Monheim, Germany
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2
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Sato H. A modern solvation theory: quantum chemistry and statistical chemistry. Phys Chem Chem Phys 2013; 15:7450-65. [DOI: 10.1039/c3cp50247c] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chuev GN, Valiev M, Fedotova MV. Integral Equation Theory of Molecular Solvation Coupled with Quantum Mechanical/Molecular Mechanics Method in NWChem Package. J Chem Theory Comput 2012; 8:1246-54. [DOI: 10.1021/ct2009297] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gennady N. Chuev
- Max Planck Institute for Mathematics in the Sciences, Inselstrasse 22, Leipzig,
04103, Germany
- Institute
of Theoretical and
Experimental Biophysics, Russian Academy of Sciences, Pushchino, Moscow Region, 142290, Russia
| | - Marat Valiev
- William R. Wiley Environmental
Molecular Sciences Laboratory, Pacific Northwest National Laboratory, P. O. Box 999, Richland, Washington 99352,
United States
| | - Marina V. Fedotova
- Institute
of Solution Chemistry, Russian Academy of Sciences, Akademicheskaya Street, 1, 153045 Ivanovo, Russia
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4
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Fedotova MV, Kruchinin SE. Hydration of acetic acid and acetate ion in water studied by 1D-RISM theory. J Mol Liq 2011. [DOI: 10.1016/j.molliq.2011.09.015] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Zevatskii YE, Samoilov DV. Modern methods for estimation of ionization constants of organic compounds in solution. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2011. [DOI: 10.1134/s1070428011100010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Zevatskii YE, Samoilov DV. Empirical method for consideration of solvent effect on the dissociation constants of carboxylic acids. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2011. [DOI: 10.1134/s1070428008010065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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7
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Zhu XQ, Wang CH. Hydride Affinity Scale of Various Substituted Arylcarbeniums in Acetonitrile. J Phys Chem A 2010; 114:13244-56. [DOI: 10.1021/jp109149x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao-Qing Zhu
- State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry, Nankai University, Tianjin 300071, China
| | - Chun-Hua Wang
- State Key Laboratory of Elemento-Organic Chemistry, Department of Chemistry, Nankai University, Tianjin 300071, China
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Kar T, Scheiner S, Roy AK. The effect on acidity of size and shape of carboxylated single-wall carbon nanotubes. A DFT-SLDB study. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.06.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Kloss T, Heil J, Kast SM. Quantum Chemistry in Solution by Combining 3D Integral Equation Theory with a Cluster Embedding Approach. J Phys Chem B 2008; 112:4337-43. [DOI: 10.1021/jp710680m] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Thomas Kloss
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstraβe 20, 64287 Darmstadt, Germany
| | - Jochen Heil
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstraβe 20, 64287 Darmstadt, Germany
| | - Stefan M. Kast
- Eduard-Zintl-Institut für Anorganische und Physikalische Chemie, Technische Universität Darmstadt, Petersenstraβe 20, 64287 Darmstadt, Germany
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10
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Yu A, Liu Y, Li Z, Cheng JP. Computation of pKaValues of Substituted Aniline Radical Cations in Dimethylsulfoxide Solution. J Phys Chem A 2007; 111:9978-87. [PMID: 17760427 DOI: 10.1021/jp072456+] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A newly developed computation strategy was used to calculate the absolute pKa values of 18 substituted aniline radical cations in dimethylsulfoxide (DMSO) solution with the error origin elucidated and deviation minimized. The B3LYP/6-311++G(2df,2p) method was applied and was found to be capable of reproducing the gas-phase proton-transfer free energies of substituted anilines with a precision of 0.83 kcal/mol. The IEF-PCM solvation model with gas-phase optimized structures was adopted in calculating the pKa values of the substituted neutral anilines in DMSO, regenerating the experimental results within a standard deviation of 0.4 pKa unit. When the IEF-PCM solvation model was applied to calculate the standard redox potentials of anilide anions, it showed that the computed values agreed well with experiment, but the redox potentials of substituted anilines were systematically overestimated by 0.304 eV. The cause of this deviation was found to be related to the inaccuracy of the calculated solvation free energies of aniline radical cations. By adjusting the size of the cavity in the IEF-PCM method, we derived a reliable procedure that can reproduce the experimental pKa values of aniline radical cations within 1.2 pKa units to those from experiment.
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Affiliation(s)
- Ao Yu
- College of Chemistry, Nankai University, State Key Laboratory of Elemento-organic Chemistry, Tianjin 300071, China
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Fu Y, Liu L, Wang YM, Li JN, Yu TQ, Guo QX. Quantum-chemical predictions of redox potentials of organic anions in dimethyl sulfoxide and reevaluation of bond dissociation enthalpies measured by the electrochemical methods. J Phys Chem A 2007; 110:5874-86. [PMID: 16640384 DOI: 10.1021/jp055682x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A first-principle theoretical protocol was developed that could predict the absolute pK(a) values of over 250 structurally unrelated compounds in DMSO with a precision of 1.4 pK(a) units. On this basis we developed the first theoretical protocol that could predict the standard redox potentials of over 250 structurally unrelated organic anions in DMSO with a precision of 0.11 V. Using the two new protocols we systematically reevaluated the bond dissociation enthalpies (BDEs) measured previously by the electrochemical methods. It was confirmed that for most compounds the empirical equation (BDE = 1.37 pK(HA) + 23.1E(o) + constant) was valid. The constant in this equation was determined to be 74.0 kcal/mol, compared to 73.3 kcal/mol previously reported. Nevertheless, for a few compounds the empirical equation could not be used because the solvation energy changed dramatically during the bond cleavage, which resulted from the extraordinary change of dipole moment during the reaction. In addition, we found 40 compounds (mostly oximes and amides) for which the experimental values were questionable by over 5 kcal/mol. Further analyses revealed that all these questionable BDEs could be explained by one of the three following reasons: (1) the experimental pK(a) value is questionable; (2) the experimental redox potential is questionable; (3) the solvent effect cannot be neglected. Thus, by developing practical theoretical methods and utilizing them to solve realistic problems, we hope to demonstrate that ab initio theoretical methods can now be developed to make not only reliable, but also useful, predictions for solution-phase organic chemistry.
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Affiliation(s)
- Yao Fu
- Department of Chemistry, University of Science and Technology of China, Hefei.
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Zhu XQ, Wang CH, Liang H, Cheng JP. Theoretical Prediction of the Hydride Affinities of Various p- and o-Quinones in DMSO. J Org Chem 2007; 72:945-56. [PMID: 17253815 DOI: 10.1021/jo0621928] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The hydride affinities of 80 various p- and o-quinones in DMSO solution were predicted by using B3LYP/6-311++G (2df,p)//B3LYP/6-31+G* and MP2/6-311++G**//B3LYP/6-31+G* methods, combined with the PCM cluster continuum model for the first time. The results show that the hydride affinity scale of the 80 quinones in DMSO ranges from -47.4 kcal/mol for 9,10-anthraquinone to -124.5 kcal/mol for 3,4,5,6-tetracyano-1,2-quinone. Such a long scale of the hydride affinities (-47.4 to -124.5 kcal/mol) indicates that the 80 quinones can form a large and useful library of organic oxidants, which can provide various organic hydride acceptors that the hydride affinities are known for chemists to choose in organic syntheses. By examining the effect of substituent on the hydride affinities of quinones, it is found that the hydride affinities of quinones in DMSO are linearly dependent on the sum of the Hammett substituent parameters sigma: DeltaGH-(Q) approximately -16.0Sigmasigmai - 70.5 (kcal/mol) for p-quinones and DeltaGH-(Q) approximately -16.2Sigmasigmai - 81.5 (kcal/mol) for o-quinones only if the substituents have no large electrostatic inductive effect and large ortho-effect. Study of the effect of the aromatic properties of quinone on the hydride affinities showed that the larger the aromatic system of quinone is, the smaller the hydride affinity of the quinone is, and the decrease of the hydride affinities is linearly to take place with the increase of the number of benzene rings in the molecule of quinones, from which the hydride affinities of aromatic quinones with multiple benzene rings can be predicted. By comparing the hydride affinities of p-quinones and the corresponding o-quinones, it is found that the hydride affinities of o-quinones are generally larger than those of the corresponding p-quinones by ca. 11 kcal/mol. Analyzing the effect of solvent on the hydride affinities of quinones showed that the effects of solvent (DMSO) on the hydride affinities of quinones are mainly dependent on the electrostatic interaction of the charged hydroquinone anions (QH-) with solvent (DMSO). All the information disclosed in this work should provide some valuable clues to chemists to choose suitable quinones or hydroquinones as efficient hydride acceptors or donors in organic syntheses and to predict the thermodynamics of hydride exchange between quinones and hydroquinones in DMSO solution.
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Affiliation(s)
- Xiao-Qing Zhu
- Department of Chemistry, the State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China.
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13
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Hori T, Takahashi H, Furukawa SI, Nakano M, Yang W. Computational Study on the Relative Acidity of Acetic Acid by the QM/MM Method Combined with the Theory of Energy Representation. J Phys Chem B 2007; 111:581-8. [PMID: 17228916 DOI: 10.1021/jp066334d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have applied the quantum mechanical/molecular mechanical (QM/MM) method combined with the theory of energy representation (ER) to study the acidity of acetic acid in aqueous solution. We have focused our attention on the relative acidity DeltapK(a) of the molecule with respect to water solvent to circumvent the ambiguity of the solvation free energies of the molecular species referred to as proton. The value of DeltapK(a) for the acetic acid has been computed as -11.5 when we adopt the free energy change in the gas phase obtained by the B3LYP functional, which is in excellent agreement with the experimental value of -11.0. It has been demonstrated that the QM/MM-ER approach recently developed gives an adequate description for the solvation free energies related to the acidity/basicity calculations of organic molecules.
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Affiliation(s)
- Takumi Hori
- Division of Chemical Engineering, Department of Materials Engineering Science, Graduate School of Engineering Science, Osaka University, Machikaneyama-cho 1-3, Toyonaka, Osaka 560-8531, Japan
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15
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Abstract
The COSMO-RS method, a combination of the quantum chemical dielectric continuum solvation model COSMO with a statistical thermodynamics treatment for realistic solvation simulations, has been used for the prediction of base pK(a) constants. For a variety of 43 organic bases the directly calculated values of the free energies of dissociation in water showed a very good correlation with experimental base pK(a) values (r2 = 0.98), corresponding to a standard deviation of 0.56 pK(a) units. Thus, we have an a priori prediction method for base pK(a) with the regression constant and the slope as only adjusted parameters. In accord with recent findings for pK(a) acidity predictions, the slope of pK(a) vs. DeltaG(diss) was significantly smaller than the theoretically expected value of 1/RTln(10). The predictivity of the presented method is general and not restricted to certain compound classes, but systematic corrections of 1 and 2 pKa units for secondary and tertiary aliphatic amines are required, respectively. The pK(a) prediction method was validated on a set of 58 complex multifunctional drug-like compounds, yielding an RMS accuracy of 0.66 pK(a) units.
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Affiliation(s)
- Frank Eckert
- COSMOlogic GmbH & Co KG, Burscheider Str. 515, D-51381 Leverkusen, Germany.
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16
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Schlosser M, Brügger N, Schmidt W, Amrhein N. β,β-Difluoro analogs of α-oxo-β-phenylpropionic acid and phenylalanine. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.06.086] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Galván IF, Martín ME, Aguilar MA. A new method to locate saddle points for reactions in solution by using the free-energy gradient method and the mean field approximation. J Comput Chem 2004; 25:1227-33. [PMID: 15139035 DOI: 10.1002/jcc.20048] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A new method for calculating saddle points of reactions in solution is presented. The main characteristics of the method are: (1) the solute-solvent system is described by the averaged solvent electrostatic potential/molecular dynamics method (ASEP/MD). This is a quantum mechanics/molecular mechanics method (QM/MM) that makes use of the mean field approximation (MFA) and that permits one to simultaneously optimize the electronic structure and geometry of the solute molecule and the solvent structure around it. (2) The transition state is located by the joint use of the free-energy gradient method and the mean field approximation. An application to the study of the Menshutkin reaction between NH(3) and CH(3)Cl in aqueous solution is discussed. The accuracy and usefulness of the proposed method is checked through comparison with other methods.
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Affiliation(s)
- I Fdez Galván
- Dpto Química Física, Universidad de Extremadura, Avda. de Elvas s/n, 06071, Badajoz, Spain
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18
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Fu Y, Liu L, Li RQ, Liu R, Guo QX. First-Principle Predictions of Absolute pKa's of Organic Acids in Dimethyl Sulfoxide Solution. J Am Chem Soc 2003; 126:814-22. [PMID: 14733556 DOI: 10.1021/ja0378097] [Citation(s) in RCA: 214] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
MP2/6-311++G(d,p) and B3LYP/6-311++G(2df,p) methods were found to be able to predict the gas-phase acidities of various organic acids with a precision of 2.2 and 2.3 kcal/mol. A PCM cluster-continuum solvation method was developed that could predict the solvation free energies of various neutral, cationic, and anionic organic species in DMSO with a precision of about 2.0 kcal/mol. Using these carefully tested methods, we successfully predicted the pKa's of 105 organic acids in DMSO with a precision of 1.7-1.8 pKa units. We also predicted the pKa's of a variety of organosilanes in DMSO for the first time using the newly developed methods. This study was one of the first that employed first-principle methods for calculating pKa's of unrelated compounds in organic solutions.
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Affiliation(s)
- Yao Fu
- Department of Chemistry, University of Science and Technology of China, Hefei 230026, China
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19
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Zahn D, Schmidt KF, Kast SM, Brickmann J. Quantum/Classical Investigation of Amide Protonation in Aqueous Solution. J Phys Chem A 2002. [DOI: 10.1021/jp012830k] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dirk Zahn
- Physikalische Chemie I, Technische Universität Darmstadt, Petersenstraβe 20, D-64287 Darmstadt, Germany
| | - Karl Friedemann Schmidt
- Physikalische Chemie I, Technische Universität Darmstadt, Petersenstraβe 20, D-64287 Darmstadt, Germany
| | - Stefan M. Kast
- Physikalische Chemie I, Technische Universität Darmstadt, Petersenstraβe 20, D-64287 Darmstadt, Germany
| | - Jürgen Brickmann
- Physikalische Chemie I, Technische Universität Darmstadt, Petersenstraβe 20, D-64287 Darmstadt, Germany
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21
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Schmidt KF, Kast SM. Hybrid Integral Equation/Monte Carlo Approach to Complexation Thermodynamics. J Phys Chem B 2002. [DOI: 10.1021/jp020495+] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Sánchez ML, Martín ME, Fdez. Galván I, Olivares del Valle FJ, Aguilar MA. Theoretical Calculation of the Stark Component of the Solute−Solvent Interaction Energy. Validity of the Mean Field Approximation in the Study of Liquids and Solutions. J Phys Chem B 2002. [DOI: 10.1021/jp0200728] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- M. L. Sánchez
- Dpto. Química-Física, Universidad de Extremadura. Avda de Elvas s/n, 06071 Badajoz, Spain
| | - M. E. Martín
- Dpto. Química-Física, Universidad de Extremadura. Avda de Elvas s/n, 06071 Badajoz, Spain
| | - I. Fdez. Galván
- Dpto. Química-Física, Universidad de Extremadura. Avda de Elvas s/n, 06071 Badajoz, Spain
| | | | - M. A. Aguilar
- Dpto. Química-Física, Universidad de Extremadura. Avda de Elvas s/n, 06071 Badajoz, Spain
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Nakabayashi T, Sato H, Hirata F, Nishi N. Theoretical Study on the Structures and Energies of Acetic Acid Dimers in Aqueous Solution. J Phys Chem A 2000. [DOI: 10.1021/jp0030239] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
| | - Hirofumi Sato
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - Fumio Hirata
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
| | - Nobuyuki Nishi
- Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
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Orozco M, Luque FJ. Theoretical Methods for the Description of the Solvent Effect in Biomolecular Systems. Chem Rev 2000; 100:4187-4226. [PMID: 11749344 DOI: 10.1021/cr990052a] [Citation(s) in RCA: 454] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Modesto Orozco
- Departament de Bioquímica i Biologia Molecular, Facultat de Química, Universitat de Barcelona, Martí i Franqués 1, E-08028 Barcelona, Spain, and Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Avgda. Diagonal s/n, E-08028 Barcelona, Spain
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25
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Wiberg KB, Clifford S, Jorgensen WL, Frisch MJ. Origin of the Inversion of the Acidity Order for Haloacetic Acids on Going from the Gas Phase to Solution. J Phys Chem A 2000. [DOI: 10.1021/jp000944a] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kenneth B. Wiberg
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, and Gaussian, Inc., 140 Washington Avenue, North Haven, Connecticut 06473
| | - Simon Clifford
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, and Gaussian, Inc., 140 Washington Avenue, North Haven, Connecticut 06473
| | - William L. Jorgensen
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, and Gaussian, Inc., 140 Washington Avenue, North Haven, Connecticut 06473
| | - Michael J. Frisch
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, and Gaussian, Inc., 140 Washington Avenue, North Haven, Connecticut 06473
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26
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Pérez P, Toro-Labbé A, Contreras R. Global and Local Analysis of the Gas-Phase Acidity of Haloacetic Acids. J Phys Chem A 2000. [DOI: 10.1021/jp994178n] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Patricia Pérez
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Correo 22, Santiago, Chile
| | - Alejandro Toro-Labbé
- Departamento de Química Física, Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Correo 22, Santiago, Chile
| | - Renato Contreras
- Departamento de Química, Centro de Mecánica Cuántica Aplicada, Facultad de Ciencias, Universidad de Chile, Casilla 653-Santiago, Chile
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27
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Shao L, Yu HA, Gao J. XSOL, a Combined Integral Equation (XRISM) and Quantum Mechanical Solvation Model: Free Energies of Hydration and Applications to Solvent Effects on Organic Equilibria. J Phys Chem A 1998. [DOI: 10.1021/jp982643v] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lei Shao
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260
| | - Hsiang-Ai Yu
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260
| | - Jiali Gao
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260
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Hirata F. Chemical Processes in Solution Studied by an Integral Equation Theory of Molecular Liquids. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1998. [DOI: 10.1246/bcsj.71.1483] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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29
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Schlosser M. Parametrisierung von Substituenten – der Einfluß von Fluor und anderen Heteroatomen auf OH-, NH- und CH-Aciditäten. Angew Chem Int Ed Engl 1998. [DOI: 10.1002/(sici)1521-3757(19980605)110:11<1538::aid-ange1538>3.0.co;2-b] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Maw SA, Bryce RA, Hall RJ, Masters AJ, Hillier IH. Integral Equation and ab Initio Study of the Effect of Solvation on Anomeric Equilibria in Aqueous Solution: Application to 4,6-Dimethyl-2-methoxytetrahydropyran. J Phys Chem B 1998. [DOI: 10.1021/jp980547o] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarah A. Maw
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, U.K
| | - Richard A. Bryce
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, U.K
| | - Richard J. Hall
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, U.K
| | - Andrew J. Masters
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, U.K
| | - Ian H. Hillier
- Department of Chemistry, University of Manchester, Manchester, M13 9PL, U.K
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31
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Nishiyama K, Honda T, Reis H, Müller U, Müllen K, Baumann W, Okada T. Electronic Structures of 9,10-Anthrylene Dimers and Trimers in Solution: Formation of Charge Separation States Depending on Alkyl Substituent Groups. J Phys Chem A 1998. [DOI: 10.1021/jp973251b] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Katsura Nishiyama
- Department of Chemistry, Graduate School of Engineering Science and Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560, Japan; Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany; and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Tsuyoshi Honda
- Department of Chemistry, Graduate School of Engineering Science and Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560, Japan; Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany; and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Heribert Reis
- Department of Chemistry, Graduate School of Engineering Science and Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560, Japan; Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany; and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Uwe Müller
- Department of Chemistry, Graduate School of Engineering Science and Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560, Japan; Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany; and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Klaus Müllen
- Department of Chemistry, Graduate School of Engineering Science and Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560, Japan; Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany; and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Wolfram Baumann
- Department of Chemistry, Graduate School of Engineering Science and Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560, Japan; Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany; and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
| | - Tadashi Okada
- Department of Chemistry, Graduate School of Engineering Science and Research Center for Materials Science at Extreme Conditions, Osaka University, Toyonaka, Osaka 560, Japan; Institut für Physikalische Chemie, Universität Mainz, D-55099 Mainz, Germany; and Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany
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32
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Sato H, Hirata F. Theoretical Study for Autoionization of Liquid Water: Temperature Dependence of the Ionic Product (pKw). J Phys Chem A 1998. [DOI: 10.1021/jp973364v] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hirofumi Sato
- Division of Theoretical Study, Institute for Molecular Science, Okazaki, 444, Japan
| | - Fumio Hirata
- Division of Theoretical Study, Institute for Molecular Science, Okazaki, 444, Japan
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33
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Ishida T, Hirata F, Sato H, Kato S. Molecular Theory of Solvent Effect on Keto−Enol Tautomers of Formamide in Aprotic Solvents: RISM-SCF Approach. J Phys Chem B 1998. [DOI: 10.1021/jp973137t] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Tateki Ishida
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444, Japan
| | - Fumio Hirata
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444, Japan
| | - Hirofumi Sato
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444, Japan
| | - Shigeki Kato
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa, Sakyo-ku, Kyoto 606, Japan, and Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444, Japan
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34
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Maw S, Sato H, Ten-no S, Hirata F. Ab initio study of water: self-consistent determination of electronic structure and liquid state properties. Chem Phys Lett 1997. [DOI: 10.1016/s0009-2614(97)88029-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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