Resonance Raman studies of benzene derivatives with methoxy substitution: Conformational symmetry-breaking effects

Horst B. Lueck, Bruce S. Hudson, Donald M. Friedrich, Marek Z. Zgierski

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Resonance Raman intensities show that methoxy substitution induces considerable allowed character to the La transition of benzene. In symmetric 1,3,5-trisubstituted benzene derivatives the induced allowed character should cancel by symmetry. However, in 1,3,5-trimethoxybenzene the resonance Raman spectrum shows a strong fundamental transition of v8, the clear signature of an allowed transition. It is shown that this is due to the presence of a C conformer of 1,3,5-trimethoxybenzene in which one of the three methoxy groups is rotated relative to the other two. This is supported by ab initio calculations of conformational energy, induced transition moment and the splitting of the v8 band.

Original languageEnglish (US)
Pages (from-to)455-458
Number of pages4
JournalJournal of Raman Spectroscopy
Volume28
Issue number6
StatePublished - Dec 1 1997

ASJC Scopus subject areas

  • Materials Science(all)
  • Spectroscopy

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