ON THE ESTIMATION OF PI INDEX OF POLYACENES
 

Padmakar V. Khadikar* and Sneha Karmarkar
Research Division, Laxmi Fumigation and Pest Control, Pvt. Ltd.,
3, Khatipura, Indore 452 007, India

Ramendra G. Varma
Department of Chemistry, P.M.B. Gujarati Science College, Indore 452 001, India
 

Abstract
General formulae are obtained for the PI (Padmakar-Ivan) index of polyacenes. The PI is a newly proposed molecular-graph-distance-based structural descriptor. By means of this result it was possible, for the first time, to examine relative correlation potential of Wiener (W)-, Szeged (Sz)- first-order connectivity (1c), and PI indices in developing Quantitative Structure-Property Relationships (QSPRs) of polyacenes in that hydrophobicity of polyacenes is used as the correlating property.