Hexamethyldisilane (
TMS
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2) is the
organosilicon compound
Organosilicon chemistry is the study of organometallic compounds containing carbon–silicon bonds, to which they are called organosilicon compounds. Most organosilicon compounds are similar to the ordinary organic compounds, being colourless, f ...
with the formula Si
2(CH
3)
6, abbreviated Si
2Me
6. It is a colourless liquid, soluble in organic solvents.
Synthesis and reactions
Hexamethyldisilane can be produced by
Wurtz-like coupling of trimethylsilyl chloride in the presence of a reducing agent such as
potassium graphite
In the area of solid state chemistry, graphite intercalation compounds are a family of materials prepared from graphite. In particular, the sheets of carbon that comprise graphite can be pried apart by the insertion ( intercalation) of ions. Th ...
:
:
With an excess of the reductant, the alkali metal silyl derivative is produced:
:
The Si-Si bond in hexamethyldisilane is cleaved by strong nucleophiles and electrophiles. Alkyl lithium compounds react as follows:
:Si
2Me
6 + RLi → RSiMe
3 + LiSiMe
3
Iodine
Iodine is a chemical element; it has symbol I and atomic number 53. The heaviest of the stable halogens, it exists at standard conditions as a semi-lustrous, non-metallic solid that melts to form a deep violet liquid at , and boils to a vi ...
gives
trimethylsilyl iodide.
:Me
3Si−SiMe
3 + I
2 → 2 SiMe
3I
References
{{Reflist
Carbosilanes
Trimethylsilyl compounds