Quantum chemical estimation of the overtone contribution to the IR spectra of hydrocarbon halogen derivatives

Enumeration of the Multiplicative Degree-Kirchhoff Index in the Random Polygonal Chains

Multiplicative degree-Kirchhoff index is a very interesting topological index. In this article, we compute analytical expression for the expected value of the Multiplicative degree-Kirchhoff index in a random polygonal. Based on the result above, we also get the Multiplicative degree-Kirchhoff index of all polygonal chains with extremal values and average values.

Enumeration of the Gutman and Schultz indices in the random polygonal chains

The Gutman index and Schultz index of a connected graph are degree-distance-based topological indices. In this paper, we devoted to establish the explicit analytical expressions for the simple formulae of the expected values of the Gutman and Schultz indices in a random polygonal. Based on these results above, we get the extremal values and average values of Gunman and Schultz indices of all polygonal chains.