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NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2021, 12 (3), P. 263–270

The F-index and coindex of V-Phenylenic Nanotubes and Nanotorus and their molecular complement graphs

Mohammed S.Y. Alsharafi – Graduate School of Natural and Applied Sciences, Yildiz Technical University, Istanbul, Turkey; alsharafi205010@gmail.com
Abdu Q. Alameri – Department of Biomedical Engineering, University of Science and Technology, Sana’a, Yemen; a.alameri2222@gmail.com

The forgotten topological index was defined to be used in the analysis of chemical structures which often appear in drug molecular graphs. In this paper, we studied the F-index and F-coindex for certain important physico chemical structures such as V-Phenylenic Nanotube V PHX[m; n] and V-Phenylenic Nanotorus V PHY [m; n] and their molecular complement graph. Moreover, we computed F-polynomial of the V-Phenylenic Nanotubes and Nanotorus. These explicit formulae can correlate the chemical structure of molecular graphs of Nanotubes and Nanotorus to information about their physicochemical structure.

Keywords: F-index, F-coindex, V-Phenylenic Nanotubes and Nanotori, molecular graph, molecular complement graph.

DOI 10.17586/2220-8054-2021-12-3-263-270

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