Dodecamethylcyclohexasilane

Dodecamethylcyclohexasilane is the organosilicon compound with the formula (CH3)12Si6. It is one of the more readily prepared and easily handled polysilanes. Dodecamethylcyclohexasilane is produced by reduction of dimethyldichlorosilane with sodium-potassium alloy:[1]

Dodecamethylcyclohexasilane
Me12Si6.svg
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 Edit this at Wikidata
EC Number
  • 223-860-0
  • 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
  • C[Si]1([Si]([Si]([Si]([Si]([Si]1(C)C)(C)C)(C)C)(C)C)(C)C)C
Properties
C12H36Si6
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).
6 (CH3)2SiCl2 + 12 M → (CH3)12Si6 + 12 MCl

The reaction also produces polydimethylsilane and decamethylpentasilane.

The chair conformer was confirmed by X-ray crystallography.[2]

ReactionsEdit

Dodecamethylcyclohexasilane reacts with potassium tert-butoxide to give the potassium derivative:[3]

(CH3)12Si6 + KOBu-t → (CH3)11Si6K + CH3OBu-t

ReferencesEdit

  1. ^ West, Robert; Brough, Lawrence; Wojnowski, Wieslaw (1979). "Dodecamethylcyclohexasilane". Inorganic Syntheses. 19: 265–268. doi:10.1002/9780470132500.ch62. ISBN 9780470132500.
  2. ^ 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.
  3. ^ 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.