Abstract
Let be a simple molecular graph without directed and multiple edges and without loops. Graph theory has become an important component of the chemical mathematics, and it has become one of the most powerful mathematical tools in the analysis and study of the architecture of a chemical network. It studies of descriptors in quantitative structure-property relationship (QSPR) and quantitative structure-activity relationship (QSAR) studies in the chemistry science. There are a lot of topological indices in QSPR/QSAR studies. In this paper, some eccentricity-based topological indices namely the eccentric connectivity index
the modified eccentric connectivity index
the total eccentricity index
the second Zagreb eccentricity index
and the average eccentricity index
are computed for the para-line graphs of some hexagonal cactus chains namely the para-chain
the ortho-chain
and the meta-chain
Acknowledgment
The authors are grateful to the editors and the anonymous referees for their constructive comments and valuable suggestions which have helped us very much to improve the paper.