Abstract
NMR studies (proton and carbon) afford an experimental tool for the evaluation of the patterns of charge delocalization and charge distribution in π-conjugated polycyclic dianions. In several cases a partitioning of charge could be observed (as well as a segregation of M.O.s), a situation unprecedented in π-conjugated systems. This charge partitioning is rationalized by the relative paratropicities of the charged and uncharged components
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