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IJC-A Vol.48A [2009] >
IJC-A Vol.48A(04) [April 2009] >


Title: Prediction of pKa from basic principles: Ab initio and DFT studies on some molecules
Authors: Hazarika, P
Sarma, Rajib L
Karim, M
Bezbaruah, B
Kalita, R
Medhi, C
Keywords: Theoretical chemistry
Ab initio calculations
Acid base equilibrium
Acid dissociation
SCRF method
Continuum model
Issue Date: Apr-2009
Publisher: CSIR
Abstract: The quantum mechanical methodology based on the description of acid-base equilibrium for predicting pKa of some selected molecules with the continuum model of solvent polarization is shown. The method is useful for predicting pKa of selective molecules where the ionization of proton is basically controlled by the lone pair electrons of atomic site. However, it fails to predict pKa of strong and very weak acids. The differences in the experimental and theoretically obtained values are negligible. The applicability of this theory for estimating pKa values of molecules within the range of 4-5 is clearly demonstrated.
Page(s): 520-525
ISSN: 0376-4710
Source:IJC-A Vol.48A(04) [April 2009]

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