Topological analysis of entropy measure using regression models for diamond structure

A numerical parameter, referred to as a topological index, is used to represent the molecular structure of a compound by analyzing its graph-theoretical characteristics. Topological indices are predictive methods for the physicochemical properties of chemical compounds in the context of quantitative structure-activity relationship (QSAR) and quantitative structure-property relationship (QSPR) analysis. Graph entropies have evolved into information-theoretic tools for exploring the structural information of molecular graphs. In this paper, we compute the Nirmala index, as well as the first and second inverse Nirmala index, for the diamond structure using its M-polynomial. Furthermore, entropy measures based on Nirmala indices are derived for the diamond structure. The comparison of the Nirmala indices and corresponding entropy measures is presented through numerical computation and 2D line plots. A regression model is built to investigate the relationship between the Nirmala indices and corresponding entropy measures.
Comment: 22 pages, 7 figures