From bifluorenylidene dianion to dibenzo[g, p]chrysene dianion: Sensitivity of anisotropy changes to bonding structure

Roy Shenhar, Ronald Beust, Stefan Hagen, Hindy E. Bronstein, Itamar Willner, Lawrence T. Scott, Mordecai Rabinovitz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Five polycyclic aromatic hydrocarbons of the C26 series having similar bonding structure yield dianions upon reduction with lithium metal. Anisotropy changes, revealed from an advanced charge distribution analysis performed on these dianions, show a correlation to the bonding structure of the dianions. Electron counting and orbital considerations rationalize this correlation in terms of aromatic/anti-aromatic behaviour that is mixed into the character of the aromatic PAH upon reduction. Predictions made regarding relative stability based on this correlation were successfully tested against calculation and experiment. The anisotropy change is suggested as a valid index for the reduction-induced change in the aromatic character of PAHs, which is applicable for both aromatic and anti-aromatic changes.

Original languageAmerican English
Pages (from-to)449-454
Number of pages6
JournalJournal of the Chemical Society. Perkin Transactions 2
Volume2
Issue number3
DOIs
StatePublished - 25 Feb 2002

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