Journal
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
Volume 758, Issue 2-3, Pages 275-278Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.theochem.2005.10.024
Keywords
perturbation theory; MP3; carboxylic acids; pK(a); PCM; acidity
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This work presents calculated values of the pK(a) for a series of carboxylic acids spanning a wide range of acidities, using quantum mechanical treatment of solute electronic structure in conjunction with a dielectric continuum model for solvation. The calculations are carried out using 3rd order M phi ller-Plesset perturbation theory. Solute-solvent interactions have been taken into account by employing the polarizable continuum model (PCM). The calculated pK(a) values are in significantly better agreement with experimental data for the majority of the acids studied than other recently published results. The mean absolute deviation of the calculated pK(a) values is 0.68 in pK(a) units, for the carboxylic acids considered. (c) 2005 Elsevier B.V. All rights reserved.
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