Chemical Applications on General Zagreb Indices of Composite Graphs

Abstract

A topological index is a quantity computed from the molecular graph, that finds application in chemistry, material science, computer science, and biological application-driven fields. Recently, the general Zagreb indices were studied, and methods for their calculation for composite graphs were established. In the present paper, we provide examples for chemical applications of these methods, computing the first and second general Zagreb indices of several composite molecular species, in particular of biphenyl, naphthalene, biphenylene, and bicoronylene. In this paper, we compute the Nirmala index and its corresponding exponential of chloroquine, hydroxychloroquine and remdesivir. Also we determine the inverse Nirmal indices of chloroquine, hydroxychloroquine and remdesivir.