French
DeutschDodecamethylcyclohexasilane
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| Names | |
|---|---|
| IUPAC name 1,1,2,2,3,3,4,4,5,5,6,6-dodecamethylhexasilinane | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.021.691 |
| EC Number |
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PubChem CID | |
CompTox Dashboard (EPA) | |
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| Properties | |
| 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). | |
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.
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Poly(dimethylsilylene), a polymer -
Decamethylcyclopentasilane, a cyclic compound
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The chair conformer of dodecamethylcyclohexasilane was confirmed by X-ray crystallography.[2][3]
Reactions
[edit]Dodecamethylcyclohexasilane reacts with potassium tert-butoxide to give the potassium derivative:[4]
- (CH3)12Si6 + KOC(CH3)3 → K(CH3)11Si6 + CH3OC(CH3)3
References
[edit]- ^ West, Robert; Brough, Lawrence; Wojnowski, Wieslaw (1979). "Dodecamethylcyclohexasilane". Inorganic Syntheses. 19: 265–268. doi:10.1002/9780470132500.ch62. ISBN 9780470132500.
- ^ Carrell, H. L.; Donohue, J. (1972). "Crystal and molecular structure of dodecamethylcyclohexasilane". Acta Crystallogr. B. 28: 1566–1571. doi:10.1107/S0567740872004595.
- ^ Omatsu, Yamato; Mizuhata, Yoshiyuki; Tokitoh, Norihiro (2018). "Synthesis of Dodecaallylhexasilacyclohexane and Its Convertibility". Zeitschrift für Anorganische und Allgemeine Chemie. 644 (17): 930–934. doi:10.1002/zaac.201800171. S2CID 105286121.
- ^ Palitzsch, Wolfram; Beyer, Christian; Böhme, Uwe; Rittmeister, Ben; Roewer, Gerhard (1999). "Preparation, Characterization, and Properties of Various Novel Ionic Derivatives of Pentacarbonyltungsten". European Journal of Inorganic Chemistry. 1999 (10): 1813–1820. doi:10.1002/(SICI)1099-0682(199910)1999:10<1813::AID-EJIC1813>3.0.CO;2-D.