Resonance Raman studies of the 1La state of 1,2,3-trisubstituted benzene derivatives: Lack of an induced transition moment

Shijian Li, Bruce S Hudson

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Resonance Raman spectra of 1,2,3-trichlorobenzene and 1,2,3-trimethylbenzene obtained with excitation in the region of the 1La electronic state exhibit the pattern of a vibronically induced transition similar to that observed for benzene and symmetric 1,3,5-trisubstituted derivatives in contrast to the allowed (B-type) pattern observed for monosubstituted and 1,4-disubstituted species. This behavior is consistent with early ideas of Sklar, Platt, Förster, Moffitt and Petruska of the perturbative vector nature of the allowed intensity component resulting from substituent effects in benzene derivatives. The present work represents the first quantitative demonstration of the applicability of these ideas to the 1La state of benzene derivatives.

Original languageEnglish (US)
Pages (from-to)581-585
Number of pages5
JournalChemical Physics Letters
Issue number6
StatePublished - Jul 29 1988
Externally publishedYes


ASJC Scopus subject areas

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

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