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The electronic spectrum of Dewar benzene

Journal Article


Abstract


  • The electronic spectrum of Dewar benzene [bicyclo (2.2.0) hexa-2,5-diene] consists of two transitions above 185 nm. The lower energy transition is structureless and broad with a maximum at 205 nm. The other system begins around 200 nm and shows initially well-defined vibronic structure on a background of increasing continuous absorption, but becomes structureless by 185 nm. Arguments are presented that the two excited states involved in the spectrum are 1A2 arising from a π-π* excitation, and 1B1 from a σ-π* excitation involving the strained σ-bridge bond in Dewar benzene. The interrelationships both photochemical and photophysical of the (CH)6 potential surface are discussed. © 1975.

Publication Date


  • 1975

Citation


  • Griffith, D. W. T., Kent, J. E., & O'Dwyer, M. F. (1975). The electronic spectrum of Dewar benzene. Journal of Molecular Spectroscopy, 58(3), 436-444. doi:10.1016/0022-2852(75)90223-4

Scopus Eid


  • 2-s2.0-49549143877

Web Of Science Accession Number


Start Page


  • 436

End Page


  • 444

Volume


  • 58

Issue


  • 3

Abstract


  • The electronic spectrum of Dewar benzene [bicyclo (2.2.0) hexa-2,5-diene] consists of two transitions above 185 nm. The lower energy transition is structureless and broad with a maximum at 205 nm. The other system begins around 200 nm and shows initially well-defined vibronic structure on a background of increasing continuous absorption, but becomes structureless by 185 nm. Arguments are presented that the two excited states involved in the spectrum are 1A2 arising from a π-π* excitation, and 1B1 from a σ-π* excitation involving the strained σ-bridge bond in Dewar benzene. The interrelationships both photochemical and photophysical of the (CH)6 potential surface are discussed. © 1975.

Publication Date


  • 1975

Citation


  • Griffith, D. W. T., Kent, J. E., & O'Dwyer, M. F. (1975). The electronic spectrum of Dewar benzene. Journal of Molecular Spectroscopy, 58(3), 436-444. doi:10.1016/0022-2852(75)90223-4

Scopus Eid


  • 2-s2.0-49549143877

Web Of Science Accession Number


Start Page


  • 436

End Page


  • 444

Volume


  • 58

Issue


  • 3