COMPARISON BETWEEN THE VERTEX-CONNECTIVITY AND EDGE-CONNECTIVITY INDEXES FOR BENZENOID HYDROCARBONS

In this report we studied the relationship between the vertex-and edge -connectivity indices, and the relationship of both these indices and the st-electron energies for benzenoid hydrocarbons. We also presented the use of edge-connectivity indices in the structure-boiling point m odeling for benzenoid hydrocarbons. The obtained structure-boiling poi nt models are compared with the models based on the vertex-connectivit y indices and the distance-dependent molecular descriptors. The best s tructure-boiling point model for benzenoids achieved here is the quadr atic model based on the edge-connectivity indices whose statistical ch aracteristics are comparable to the best model from the literature; th at is, Randic's model based on the multivariate regression analysis wi th the first-, second-, third-, and fourth-order geometric distance in dices.