Chemistry:Dodecamethylcyclohexasilane

Dodecamethylcyclohexasilane

Names
IUPAC name 1,1,2,2,3,3,4,4,5,5,6,6-dodecamethylhexasilinane
Identifiers
CAS Number	4098-30-0 Y
3D model (JSmol)	Interactive image
ChemSpider	70132
EC Number	223-860-0
PubChem CID	77732
InChI InChI=1S/C12H36Si6/c1-13(2)14(3,4)16(7,8)18(11,12)17(9,10)15(13,5)6/h1-12H3 Key: RTCLHEHPUHREBC-UHFFFAOYSA-N
SMILES C[Si]1([Si]([Si]([Si]([Si]([Si]1(C)C)(C)C)(C)C)(C)C)(C)C)C
Properties
Chemical formula	Si 6(CH 3) 12
Molar mass	348.930 g·mol−1
Appearance	colorless solid
Density	0.988 g/cm3
Melting point	254–257 °C (489–495 °F; 527–530 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Dodecamethylcyclohexasilane is the organosilicon compound with the formula Si
6(CH
3)
12. It is one of the more readily prepared and easily handled polysilanes. Dodecamethylcyclohexasilane is produced by reduction of dimethyldichlorosilane with sodium-potassium alloy:

6 (CH
3)
2SiCl
2 + 12 M → Si
6(CH
3)
12 + 12 MCl

where M is Na or K. The reaction also produces a polymer poly(dimethylsilylene) [–Si(CH
3)
2–]
n and a cyclic compound decamethylcyclopentasilane Si
5(CH
3)
10.

• 

  Poly(dimethylsilylene), a polymer

• 

  Decamethylcyclopentasilane, a cyclic compound

The chair conformer of dodecamethylcyclohexasilane was confirmed by X-ray crystallography.

Reactions

Dodecamethylcyclohexasilane reacts with potassium tert-butoxide to give the potassium derivative:

(CH
3)
12Si
6 + KOC(CH
3)
3 → K(CH
3)
11Si
6 + CH
3OC(CH
3)
3