Symmetry anomaly in disubstituted benzenes

J. M. André, J. L. Brédas, V. Coropceanu, R. J. Silbey

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The anomalies in the symmetry of disubstituted benzenes were analyzed. The perturbation affects only the energy of the lowest occupied π level and that of the highest unoccupied π level. The same feature was observed for other annulenes and the connection with Berry's phase problem was also discussed.

Original languageEnglish (US)
Pages (from-to)1428-1439
Number of pages12
JournalInternational Journal of Quantum Chemistry
Issue number4-5
StatePublished - Nov 15 2002


  • Donor and acceptor groups
  • Free electron model
  • Hückel method
  • Orbital degeneracy
  • Perturbation theory
  • Substituted benzenes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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