Y-index of some graph operations

Abstract

Topological indices have important role in theoretical chemistry. Among the all topological indices the Zagreb indices have been used more considerably than any other topological indices in chemical literature. In this study, the Y-index for some special graphs, and graph operations has been computed, that have been applied to compute the Y-index for Nano- tube and Nano-torus. Also the strong/good correlation coefficient between the Y-index and some physical and chemical properties as Acentric factor (Acenfac), Entropy (S),Enthalpy of vaporization (HVAP) and Standard enthalpy of vaporisation (DHVAP) have been Appeared.