Chemical Physics Letters, Vol.475, No.1-3, 146-148, 2009
Comparison between the sum-connectivity index and product-connectivity index for benzenoid hydrocarbons
The Randic (product-)connectivity index and its derivative called the sum-connectivity index are compared and it is shown that these both descriptors correlate well among themselves and with the pi-electronic energies of benzenoid hydrocarbons. (C) 2009 Published by Elsevier B.V.