THE Y- INDEX AND COINDEX OF V C5C7[p, q] AND HC5C7[p, q] NANOTUBES

THE Y- INDEX AND COINDEX OF V C5C7[p, q] AND HC5C7[p, q] NANOTUBES

M. Alsharafi, A. Alameri, Y. Zeren

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Abstract

The Y-index and coindex are degree based molecular structure descriptors that have been shown to give a high degree of predictability compare to Zagreb indices and F-index and their coindices for some physicochemical properties of octane isomers. In this paper, we studied the Y - index and Y - coindex for certain important chemi- cal structures like line graphs of the V C5C7[p; q] and HC5C7[p; q] nanotubes and their molecular complement graph. Moreover, we de ned Y polynomial of graph G and applied it on the line graphs of the V C5C7[p; q] and HC5C7[p; q] nanotubes. These ex- plicit formulae can correlate the chemical structure of molecular graph of nanotube to information about their physical structure.

Keywords

Y-index, Y-coindex, V C5C7[p; q] nanotube, HC5C7[p; q] nanotube, molecular graph, molecular complement graph.