Hexamethyldisilane
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Identifiers | |||
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1450-14-2 | |||
1633463 | |||
ChemSpider | 66675 | ||
EC Number | 215-911-0 | ||
Jmol interactive 3D | Image | ||
PubChem | 74057 | ||
RTECS number | JM9170000 | ||
UN number | 1993 | ||
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Properties | |||
Si2C6H18 | |||
Molar mass | 146.39 g mol−1 | ||
Appearance | Colourless liquid | ||
Density | 0.715 g/cm3 | ||
Melting point | 14 °C; 57 °F; 287 K | ||
Boiling point | 113 °C; 235 °F; 386 K | ||
Refractive index (nD) |
1.422 | ||
Thermochemistry | |||
Std molar entropy (S |
255.89 J K−1 mol−1 (at 22.52 °C) | ||
Hazards | |||
GHS pictograms | |||
GHS signal word | DANGER | ||
H225, H319, H334, H335 | |||
P210, P261, P305+351+338, P342+311 | |||
EU classification (DSD) |
F Xi | ||
R-phrases | R11, R36/37, R43 | ||
S-phrases | S16, S23, S45 | ||
Flash point | 11 °C (52 °F; 284 K) | ||
Related compounds | |||
Related alkylsilanes |
Tetramethylsilane | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
verify (what is ?) | |||
Infobox references | |||
Hexamethyldisilane is the organosilicon compound with the formula Si2(CH3)6, abbreviated Si2Me6. It is a colourless liquid, soluble in organic solvents.[1]
The Si-Si bond in hexamethyldisilane is cleaved by strong nucleophiles and electrophiles. Alkyl lithium compounds react as follows:
- Si2Me6 + RLi → RSiMe3 + LiSiMe3
Iodine gives trimethylsilyl iodide.[2]
- Me3Si−SiMe3 + I2 → 2 SiMe3I
References
- ↑ Tamejiro Hiyama, Manabu Kuroboshi, "Hexamethyldisilane" Encyclopedia of Reagents for Organic Synthesis, 2001 John Wiley & Sons. doi:10.1002/047084289X.rh015
- ↑ Olah, G.; Narang, S.C. (1982). "Iodotrimethylsilane—a versatile synthetic reagent". Tetrahedron 38 (15): 2225. doi:10.1016/0040-4020(82)87002-6.
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