Vertex eccentric connectivity index of chemicalgraphs obtained from(a)bis(pyridine)-cobalt(III)chloride

Let G = (V, E) be a graph. Topological indices are numerical descriptors that provide information about the molecular structure based on the structural properties of the corresponding molecular graph. Among the various topological indices available for graphs, eccentricity-based indices such as vertex eccentric and modified vertex eccentric connectivity indices are particularly significant for QSAR/QSPR studies. In this paper, these indices are computed for self-centered graphs, regular graphs, and graphs obtained by graph operations such as join and Cartesian product. Further, we examine these indices for a molecular graph of (a)bis(pyridine)-cobalt(III)chloride.