Bis(trimethylsilyl)acetylene

ALDRICH/187437 - 99%

Synonym: BTMSA

CAS Number: 14630-40-1
Empirical Formula (Hill Notation): C₈H₁₈Si₂
Molecular Weight: 170.40
EC Number: 238-671-9
MDL Number: MFCD00008276
Linear Formula: (CH₃)₃SiC≡CSi(CH₃)₃
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-187437-10G	10 g	$72.00 1/EA	Add To Favorites
45-187437-50G	50 g	$253.00 1/EA	Add To Favorites

This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material. This image depicts SKU: 187437-50G.

Properties
Descriptions
Safety Info.
Basic Data

assay	99%
bp	136-137 °C (lit.)
density	0.752 g/mL at 25 °C (lit.)
InChI	1S/C8H18Si2/c1-9(2,3)7-8-10(4,5)6/h1-6H3
InChI key	ZDWYFWIBTZJGOR-UHFFFAOYSA-N
mp	21-24 °C (lit.)
Quality Level	100
refractive index	n20/D 1.427 (lit.)
SMILES string	C[Si](C)(C)C#C[Si](C)(C)C
storage temp.	2-8°C

Application:	Bis(trimethylsilyl)acetylene (BTMSA) was used as starting reagent in the synthesis of functionalized 4-R-1,2-bis(trimethylsilyl)benzenes. It was also used in the synthesis of (+)-brasilenyne and (β-diketanato)Ag(BTMSA).
General description:	Bis(trimethylsilyl)acetylene (BTMSA) participates as nucleophile in Friedel-Crafts type acylations and alkylations. BTMSA undergoes rhodium catalyzed addition reaction with diarylacetylenes. It undergoes cycloaddition with 1,5-hexadiynes in the presence of CpCo(CO)₂ (Cp=cyclopentadienyl) to form benzocyclobutenes. Structure of BTMSA was characterized by a centre of inversion present on triple bond (length=1.208(3)Å). TiCl₄-Et₂AlCl catalyzed Diels-Alder reaction of BTMSA with norbornadiene has been reported.
Packaging:	10, 50 g in glass bottle

Symbol	GHS02,GHS07
Signal word	Danger
Hazard statements	H225 - H315 - H319 - H335
Precautionary statements	P210 - P302 + P352 - P305 + P351 + P338
Hazard Codes	F,Xi
Risk Statements	11-36/37/38
Safety Statements	16-26-36
RIDADR	UN 1993BF 3 / PGII
WGK Germany	WGK 3
Flash Point(F)	35.6 °F - closed cup
Flash Point(C)	2 °C - closed cup

Purity	99%
bp	136-137 °C (lit.)
mp	21-24 °C (lit.)
Density	0.752 g/mL at 25 °C (lit.)
Refractive Index	n20/D 1.427 (lit.)
Storage Temp.	2-8°C
UNSPSC	12352100

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