Let G be a molecular graph, a topological index is a numeric quantity related to G which is invariant under graph automorphisms. The eccentric connectivity index ξ(G) is defined as ξ(G) = ∑vV(G) d x ε(v) where dv, ε(v) denote the degree of vertex v in G and the largest distance between vand any other vertex u of G. The connective eccentric index of graph G is defined as Cξ(G) = ∑vV(G) dv /ε(v) In the present paper we compute the connective eccentric index of CircumcoroneneHomologous Series of Benzenoid Hk (k ≥ 1).
International Letters of Chemistry, Physics and Astronomy (Volume 32)
M. R. Farahani "Connective Eccentric Index of Circumcoronene Homologous Series of Benzenoid Hk", International Letters of Chemistry, Physics and Astronomy, Vol. 32, pp. 71-76, 2014