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
ECHA InfoCard	100.021.691
EC Number	223-860-0
PubChem CID	77732
CompTox Dashboard (EPA)	DTXSID9063297
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	Si6(CH3)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 Si₆(CH₃)₁₂. It is one of the more readily prepared and easily handled polysilanes. Dodecamethylcyclohexasilane is produced by reduction of dimethyldichlorosilane with sodium–potassium alloy:^[1]

6 (CH₃)₂SiCl₂ + 12 M → Si₆(CH₃)₁₂ + 12 MCl

where M is Na or K. The reaction also produces a polymer poly(dimethylsilylene) [−Si(CH₃)₂−]_n and a cyclic compound decamethylcyclopentasilane Si₅(CH₃)₁₀.

The chair conformer of dodecamethylcyclohexasilane was confirmed by X-ray crystallography.^[2][3]