The extended Wiener index

Comparison with the Wiener number and the molecular connectivity index, a novel set of Wiener indexes (mWp, mWpc, mWc and mWch) were defined, which are named the extended Wiener index. The potential usefulness of the extended Wiener index in QSAR/QSPR is evaluated by its correlation with a number of C3–C8 alkanes and by a favorable comparison with models based on molecular connectivity index.