Intramolecular orbital interactions in 9,10-disilatriptycene studied by photoelectron spectroscopy

Mari Kubota, Ken Hatano, Masaki Takahashi, Yuzo Kawada, Tsunetoshi Kobayashi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

9,10-Disilatriptycene is of high symmetry and structurally very close to triptycene. In the latter case it is known that the through-space orbital interactions among the π electron systems of the three benzene rings predominate, the effect of the through-bond interactions being negligibly small. In this study, the vapor-phase He(I) photoelectron spectra of triptycene and 9,10-disilatriptycene were measured and studied comparatively in order to investigate the relative importance of the Jahn-Teller effects in the cationic states of these compounds, the through-space and the through-bond interactions. Simple LCBO model calculations could reproduce almost quantitatively the features of their observed spectral patterns. The spectral pattern is quite complex in 9,10-disilatriptycene in contrast to that of triptycene due to the back-donation from the benzene rings to the Si atoms in addition to the Jahn-Teller effects in the cationic states and the through-space interactions.

Original languageEnglish
Pages (from-to)165-172
Number of pages8
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume83
Issue number2-3
DOIs
Publication statusPublished - 1997 Feb 1

Keywords

  • 9,10-disilatriptycene
  • Back-donation
  • He(I) Photoelectron spectroscopy
  • Through-space interaction
  • Triptycene

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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