Infrared spectrum of the silicon hydride cation SiH7+

Yibin Cao, Jong Ho Choi, Bernd Michael Haas, Matthew S. Johnson, Mitchio Okumura

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27 Citations (Scopus)


We report the infrared spectrum of the silicon hydride cluster ion SiH7+ obtained by vibrational predissociation spectroscopy. SiH7+ ions were excited by a tunable infrared laser, and the resulting SiH5+ photofragment intensity was measured as a function of the laser wavelength. We observed a vibrational band centered at 3866 cm-1, which we assigned as a perturbed H2 stretch. The absence of a second band between 3500 and 4200 cm-1 suggests that the ion forms a symmetric complex with the structure H2·SiH3+·H2, in contrast to the species CH7+, which has the structure CH5+·H2.

Original languageEnglish
Pages (from-to)5215-5217
Number of pages3
JournalJournal of Physical Chemistry
Issue number20
Publication statusPublished - 1993

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry


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