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Keywords:

  • Gas-phase chemistry;
  • IR spectroscopy;
  • protonated disilane;
  • silicon;
  • structure elucidation
Thumbnail image of graphical abstract

Structure elucidation: The IR spectrum of the protonated disilane Si2H7+ has been derived by resonant IR photodissociation spectroscopy of weakly bound Si2H7+⋅Ne clusters (see picture). Analysis of the spectra provides the first characterization of this fundamental polysilane cation and direct evidence for the nonlinear Si[BOND]H[BOND]Si proton bridge with a three-center two-electron bond.