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Keywords:

  • cage compounds;
  • photoelectron spectroscopy;
  • quantum chemistry;
  • strained molecules;
  • tetrahedranes
Thumbnail image of graphical abstract

Strained cages: UV-photoelectron spectroscopy studies of tetrakis(trimethylsilyl)tetrahedrane and its pentafluorophenyl derivative (see figure) demonstrate the effectiveness of the neutral hyperconjugation in the latter, which was initially proposed on the basis of electronic spectra and computational data.