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Volumn 126, Issue 3, 2004, Pages 814-822

First-Principle Predictions of Absolute pKa's of Organic Acids in Dimethyl Sulfoxide Solution

Author keywords

[No Author keywords available]

Indexed keywords

ACIDITY; FREE ENERGY; MATHEMATICAL MODELS; NEGATIVE IONS; ORGANIC SOLVENTS; POSITIVE IONS; SILANES;

EID: 1642535349     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0378097     Document Type: Article
Times cited : (257)

References (107)
  • 50
    • 0037992414 scopus 로고    scopus 로고
    • Saracino, G. A. A.; Improta, R.; Barone, V. Chem. Phys. Lett. 2003, 373, 411. It is worthy to note that in this study the authors showed that geometry reoptimization in solution might lead to significant improvement for the solvation free energy calculations.
    • (2003) Chem. Phys. Lett. , vol.373 , pp. 411
    • Saracino, G.A.A.1    Improta, R.2    Barone, V.3
  • 55
    • 1642529868 scopus 로고
    • (b) Snieckus, V. A., Ed. Advances in Carbanion Chemistry; JAI Press: Greenwich, CT, 1992; Vol. 1; 1994; Vol. 2.
    • (1994) Advances in Carbanion Chemistry , vol.2
  • 57
    • 0344887064 scopus 로고
    • and references therein
    • Bordwell, F. G. Acc. Chem. Res. 1988, 21, 456 and references therein.
    • (1988) Acc. Chem. Res. , vol.21 , pp. 456
    • Bordwell, F.G.1
  • 59
    • 0001397386 scopus 로고
    • a's in DMSO using certain correlation methods or extra experimental parameters have also been reported. See: (a) Gushurst, A. J.; Jorgensen, W. L. J. Org. Chem. 1986, 51, 3513.
    • (1986) J. Org. Chem. , vol.51 , pp. 3513
    • Gushurst, A.J.1    Jorgensen, W.L.2
  • 63
    • 1642570598 scopus 로고    scopus 로고
    • note
    • All of the compounds that contain no more than 10 non-hydrogen atoms in Bordwell's review paper18 were considered in the present study. Larger compounds are too resource demanding and, therefore, are not used.
  • 65
    • 0001520083 scopus 로고    scopus 로고
    • A recent critical test of performance of B3LYP functional for prediction of gas-phase acidities showed that the average absolute errors of the theoretical results were below 2.5 kcal/mol (Burk, P.; Koppel, I. A.; Koppel, I.; Leito, I.; Travnikova, O. Chem. Phys. Lett. 2000, 323, 482). Our results are in agreement with this report.
    • (2000) Chem. Phys. Lett. , vol.323 , pp. 482
    • Burk, P.1    Koppel, I.A.2    Koppel, I.3    Leito, I.4    Travnikova, O.5
  • 76
    • 1642529867 scopus 로고    scopus 로고
    • note
    • - in DMSO are -8.5, -265.4, and -58.5 kcal/mol. Therefore, the solute-phase free energy (reference state: 1 mol/L, 298 K) of the reaction is 369.1 + 8.5 - 265.4 - 58.5 + RT In(ŘT) = 55.6 kcal/mol.
  • 106
    • 1642570597 scopus 로고    scopus 로고
    • note
    • a should correspond to free ion acidity in the solution. However, in the measurement, the silyl anion probably exists in a contact ion pair.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.