Name | Bis(trimethylsilyl)acetylene |
Synonyms | BSTMA BTMSA ICLA-002 TIMTEC-BB SBB008997 BIS(TRIMETHYLSILYL)ACETYLENE Bis(trimethylsilyl)acetylene 1,2-Bis(trimethylsilyl)ethyne 1,2-BIS-TRIMETHYLSILANYL-ETHYNE 1,2-Bis(trimethylsilyl)acetylene ethyne-1,2-diylbis(trimethylsilane) Silane, 1,2-ethynediylbis[trimethyl- 2,5-Disilahex-3-yne, 2,2,5,5-tetramethyl- |
CAS | 14630-40-1 |
EINECS | 238-671-9 |
InChI | InChI=1/C8H18Si2/c1-9(2,3)7-8-10(4,5)6/h1-6H3 |
InChIKey | ZDWYFWIBTZJGOR-UHFFFAOYSA-N |
Molecular Formula | C8H18Si2 |
Molar Mass | 170.4 |
Density | 0.752g/mLat 25°C(lit.) |
Melting Point | 21-24°C(lit.) |
Boling Point | 136-137°C(lit.) |
Flash Point | 29 °C |
Water Solubility | MAY DECOMPOSE |
Vapor Presure | 9.9mmHg at 25°C |
Appearance | liquid |
Specific Gravity | 0.770 |
Color | colorless |
BRN | 906870 |
Storage Condition | 2-8°C |
Sensitive | 2: reacts with aqueous acid |
Refractive Index | n20/D 1.427(lit.) |
Risk Codes | R11 - Highly Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. R10 - Flammable |
Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
UN IDs | UN 1993 3/PG 2 |
WGK Germany | 3 |
FLUKA BRAND F CODES | 10 |
TSCA | Yes |
HS Code | 29310095 |
Hazard Class | 3 |
Packing Group | III |
NIST chemical information | information provided by: webbook.nist.gov (external link) |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
Use | bis (trimethylsilyl) acetylene can be used as a silicon-based protecting group for the use of the 1,3-bipolar cycloaddition synthesis of pyrazole, a substrate for nickel-catalyzed coupling reactions with benzonitrile. silicon-based protecting group, organic synthesis. |
synthetic method | bis (trimethylsilyl) acetylene can be synthesized by the following steps: 1 with two metal salts of acetylene and trimethylhalosilane as raw materials, the molar mass ratio of two metal salts of acetylene and trimethylhalosilane is 1:2.0~1:2.2, first, the dimetal acetylene salt is suspended in toluene, then trimethylhalosilane is added dropwise, then the temperature is raised to 50~60 ℃ for 2 hours, the two metal salts of acetylene are disodium acetylene or lithium diacetylene; 2 the reaction is terminated with water, extracted, dried, concentrated under reduced pressure, and distilled under reduced pressure to obtain ditrimethylsilyl acetylene with a purity of more than 99%, the yield was more than 90%. |