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Silicon tetraiodide

Other names

silicon tetraiodide
Tetraiodosilane

Identifiers

CAS number

13465-84-4

Properties

Molecular formula

SiI₄

Molar mass

535.70 g/mol

Appearance

white powder

Density

4.198 g/cm³, solid

Melting point

121 °C, 394 K, 250 °F

Boiling point

288 °C, 561 K, 550 °F

Solubility in organic solvents

soluble

Structure

Molecular shape

tetrahedral

Hazards

EU classification

not listed

NFPA 704

R-phrases

R61-R24/25-R34-R42/43

S-phrases

S53-S26-S36/37/39-S45

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Silicon iodide is the chemical compound with the formula Si I₄. It is a tetrahedral molecule with Si-I bond lengths of 2.432(5) Å.^[1]

Additional recommended knowledge

Essential Laboratory Skills Guide

Daily Sensitivity Test

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SiI₄ is a precursor to silicon amides of the formula Si(NR₂)₄ (R = alkyl).^[2]It has also been of interest in the manufacture and etching of silicon in microelectronics.

References

^ Kolonits, M.; Hargittai, M. "Molecular Structure of Silicon Tetraiodide" Structural Chemistry 1998, volume 9, pages 349-352. doi:10.1023/A:1022462926682
^ Banerjee, C.; Wade, C. R.; Soulet, A.; Jursich, G.; McAndrew, J.; Belot, J. A. "Direct Syntheses and Complete Characterization of Halide-Free Tetrakis(dialkylamino)silanes" Inorganic Chemistry Communications 2006, volume 9, pages 761-763.

Category: Iodides