Hexamethyldisilane
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| Hexamethyldisilane | |
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| Identifiers | |
| CAS number | 1450-14-2  |
| PubChem | 74057 |
| ChemSpider | 66675 |
| EC number | 215-911-0 |
| UN number | 1993 |
| RTECS number | JM9170000 |
| Beilstein Reference | 1633463 |
| Jmol-3D images | {{#if:C[Si](C)(C)[Si](C)(C)C|Image 1 |
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| Properties | |
| Molecular formula | 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 | |
| Standard molar entropy S |
255.89 J K-1 mol-1 (at 22.52 °C) |
| Hazards | |
| GHS pictograms |    |
| GHS signal word | DANGER |
| GHS hazard statements | H225, H319, H334, H335 |
| GHS precautionary statements | P210, P261, P305+351+338, P342+311 |
| EU classification |  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 |
(verify) (what is: / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | |
| 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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