Article

Structural Chemistry

, Volume 9, Issue 5, pp 349-352

Molecular Structure of Silicon Tetraiodide

  • Maria KolonitsAffiliated withStructural Chemistry Research Group of the Hungarian Academy of Sciences, Eötvös University
  • , Magdolna HargittaiAffiliated withStructural Chemistry Research Group of the Hungarian Academy of Sciences, Eötvös University

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Abstract

The molecular geometry of silicon tetraiodide was determined by gas-phase electron diffraction at 378 K. The molecule has a regular tetrahedral shape with an Si—I bond length (r g) of 2.432(5) Å and an I⋅⋅⋅I nonbonded distance (r g) of 3.971(8) Å. There is an apparent anharmonicity in both the stretching and the bending vibrations, with the latter especially pronounced.

Silicon tetraiodide molecular structure electron diffraction normal coordinate analysis