Abstract
By adopting the convention that shared double bonds in polycyclic conjugated hydrocarbons contribute with one π-electron and unshared ones with two π-electrons, a partition of π-electrons in each ring (π-electron content, EC) can be obtained by averaging over all Kekule structures, which are assumed to have equal weights. This affords a simple measure of local aromaticity that is comparable with other such local aromaticity indices in polycyclic benzenoids.
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