Rydberg bands in the UV spectrum of thiophene and its derivatives

Research output: Article

15 Citations (Scopus)


The ultraviolet spectra of twelve halogenothiphenes have been recorded in the vapour phase. New transitions were observed in the region 45 000 to 50 000 cm-1 which are absent in solution spectra and are assigned to Rydberg transitions. There is a good agreement of the band positions with those calculated from adiabatic ionization potential, using the quantum defect of thiphene. A study of the vibronic structure does not rule out the possible existence of two Rydberg-transitions. The vibrational frequencies of the fine structure are close to the observed values in the UP spectrum. The other members of the Rydberg series can be found in the far ultraviolet spectrum of thiophene.

Original languageEnglish
Pages (from-to)253-259
Number of pages7
JournalJournal of Molecular Structure
Issue number3-4
Publication statusPublished - febr. 1986

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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