Dodecamethylcyclohexasilane
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IUPAC name 1,1,2,2,3,3,4,4,5,5,6,6-dodecamethylhexasilinane | |
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ECHA InfoCard | 100.021.691 |
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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 |
Chemical compound
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.
- Poly(dimethylsilylene), a polymer
- Decamethylcyclopentasilane, a cyclic compound
The chair conformer of dodecamethylcyclohexasilane was confirmed by X-ray crystallography.[2][3]
Reactions
Dodecamethylcyclohexasilane reacts with potassium tert-butoxide to give the potassium derivative:[4]
- (CH3)12Si6 + KOC(CH3)3 → K(CH3)11Si6 + CH3OC(CH3)3
References
- ^ 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.