Advancement In Qspr Modeling
Authors:
Mr. Sujit Arun Desai,
Dr. M.S.Bhatia,
Dr. P.B.Choudhari,
Dr. Mrs. N.M. Bhatia,
Format: Paperback | Genre : Computers & Internet | Other Book Detail
Format: Paperback | Genre : Computers & Internet | Other Book Detail
The rapid development of modern computational technology has created an entirely new
environment for the efficient use of the theoretical construction in many areas of applied
research. The theoretical approach has proven to be especially beneficial in chemistry
and allied sciences, where the experimental-analysis and artificial development of new
compounds and materials can be time-consuming, laborious, expensive or even
hazardous. Hence there is a need of alternate approach to experimental process (M.
Karelson et al., 1999). A feasible estimation method should satisfy the following
conditions: (i) It can be applicable to diverse set of compounds; (ii) It requires minimum
number of inputs; (iii) It should provide reasonable accuracy to the predicted output;
(iv)It needs minimum computation time (Yaffe et al., 2001). Numerous estimation
methods are reported in literature to predict a given physical or chemical property. On
the other hand, as the heterogeneity in the chemical structure of the compounds
increases, property prediction becomes less reliable and consumes more time. The
different approaches generally used for prediction of physical properties can be
classified into the following categories(1) Correlation based on experimental data; (2)
Group contribution method based on fragments; (3) Correspondence theorem based on
critical properties. The first approach requires experimental data as input (such as
density boiling point etc.) are limited to compounds for which such experimental data
available. Second approach requires fragments such as number of bonds, functional
groups etc for correlation. In the third approach, due to the lack of availability of critical
properties, prediction errors are considerably high and hence its application is limited.
This method has no reliability with multiple functional groups for isomers. Therefore
there is a necessity of reliable property prediction models capable of a prior prediction of
properties of diverse set of compounds, thereby reducing the burden of experimental
process (Yaffe et al., 2001).
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