Molecules 2004, 9(12), 1177-1193; doi:10.3390/91201177
Article

Variable Connectivity Index as a Tool for Modeling Structure-Property Relationships

1,* email, 2email, 3email and 3email
Received: 2 July 2004; Accepted: 14 October 2004 / Published: 31 December 2004
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: We report on the calculation of normal boiling points for a series of n = 58 aliphatic alcohols using the variable connectivity index in which variables x and y are used to modify the weights on carbon (x) and oxygen atoms (y) in molecular graphs, respectively. The optimal regressions are found for x = 0.80 and y = -0.90. Comparison is made with available regressions on the same data reported previously in the literature. A refinement of the model was considered by introducing different weights for primary, secondary, tertiary, and quaternary carbon atoms. The standard error in the case of the normal boiling points of alcohols was slightly reduced with optimal weights for different carbon atoms from s = 4.1°C (when all carbon atoms were treated as alike) to s = 3.9 °C.
Keywords: Flexible molecular descriptors; Variable connectivity index; Aliphatic alcohols; Normal boiling points.
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MDPI and ACS Style

Randić, M.; Pompe, M.; Mills, D.; Basak, S.C. Variable Connectivity Index as a Tool for Modeling Structure-Property Relationships. Molecules 2004, 9, 1177-1193.

AMA Style

Randić M, Pompe M, Mills D, Basak SC. Variable Connectivity Index as a Tool for Modeling Structure-Property Relationships. Molecules. 2004; 9(12):1177-1193.

Chicago/Turabian Style

Randić, Milan; Pompe, Matevž; Mills, Denise; Basak, Subhash C. 2004. "Variable Connectivity Index as a Tool for Modeling Structure-Property Relationships." Molecules 9, no. 12: 1177-1193.

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