The present paper carries out the QSPR analysis for two data sets: monocarboxylic acids and polycyclic aromatic hydrocarbons (PAH) to determine the predicting capacity of topological indices namely KCD indices. The examined parameters show high correlation with the physical properties of the monocarboxylic acids and PAH. Finally, the analysis has revelead that these novel indices have high predicting capacity, hence they are useful and applicable to predict the physico-chemical properties of monocarboxylic acids and PAH.

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