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Bis(trimethylsilyl)acetylene

Product Name
Bis(trimethylsilyl)acetylene
CAS No.
14630-40-1
Chemical Name
Bis(trimethylsilyl)acetylene
Synonyms
BTMSA;1,2-Bis(trimethylsilyl)ethyne;BSTMA;Bis(trimethylsilyl)ethyne;1,2-BIS-TRIMETHYLSILANYL-ETHYNE;DK079;DK080;ICLA-002;TIMTEC-BB SBB008997;Ethynylbistrimethylsilanel
CBNumber
CB4376321
Molecular Formula
C8H18Si2
Formula Weight
170.4
MOL File
14630-40-1.mol
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Bis(trimethylsilyl)acetylene Property

Melting point:
21-24 °C(lit.)
Boiling point:
136-137 °C(lit.)
Density 
0.752 g/mL at 25 °C(lit.)
refractive index 
n20/D 1.427(lit.)
Flash point:
29 °C
storage temp. 
2-8°C
solubility 
soluble in Chloroform, Methanol
form 
liquid
Specific Gravity
0.770
color 
colorless
Water Solubility 
MAY DECOMPOSE
Hydrolytic Sensitivity
2: reacts with aqueous acid
BRN 
906870
InChIKey
ZDWYFWIBTZJGOR-UHFFFAOYSA-N
CAS DataBase Reference
14630-40-1(CAS DataBase Reference)
NIST Chemistry Reference
Silane, 1,2-ethynediylbis[trimethyl-(14630-40-1)
EPA Substance Registry System
Silane, 1,2-ethynediylbis[trimethyl- (14630-40-1)
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Safety

Hazard Codes 
F,Xi
Risk Statements 
11-36/37/38-10
Safety Statements 
16-26-36
RIDADR 
UN 1993 3/PG 2
WGK Germany 
3
F 
10
TSCA 
Yes
HazardClass 
3
PackingGroup 
III
HS Code 
29310095
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Danger
Hazard statements

H225Highly Flammable liquid and vapour

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
187437
Product name
Bis(trimethylsilyl)acetylene
Purity
99%
Packaging
10g
Price
$65.6
Updated
2024/03/01
Sigma-Aldrich
Product number
187437
Product name
Bis(trimethylsilyl)acetylene
Purity
99%
Packaging
50g
Price
$230
Updated
2024/03/01
TCI Chemical
Product number
B1090
Product name
Bis(trimethylsilyl)acetylene
Purity
>97.0%(GC)
Packaging
5g
Price
$87
Updated
2024/03/01
TCI Chemical
Product number
B1090
Product name
Bis(trimethylsilyl)acetylene
Purity
>97.0%(GC)
Packaging
25g
Price
$261
Updated
2024/03/01
Alfa Aesar
Product number
A11960
Product name
Bis(trimethylsilyl)acetylene, 99%
Packaging
10g
Price
$52.65
Updated
2024/03/01
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Bis(trimethylsilyl)acetylene Chemical Properties,Usage,Production

Chemical Properties

clear colorless liquid after melting

Uses

In the presence of CpCo(CO)2 (cat. no. 245259), undergoes cycloaddition with 1,5-hexadiynes to form benzocyclobutenes.1

Uses

BTMSA is used as starting reagent in the synthesis of functionalized 4-R-1,2-bis(trimethylsilyl)benzenes. It is also used in the synthesis of (+)-brasilenyne2 and (β-diketanato)Ag(BTMSA). Bis(trimethylsilyl)acetylene is a ligand that binds to a central metal ion (e.g. Titanium) to create a coordination complex. One of its complexes, Permethyltitanocene-bis(trimethylsilyl)acetylene, is a catalyst for the head-to-tail dimerization of 1-alkynes (e.g. 3-Penten-1-yne [P227430]).

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)?). TiCl4-Et2AlCl catalyzed Diels-Alder reaction of BTMSA with norbornadiene has been reported.

Purification Methods

Dissolve it in pet ether and wash it with ice-cold dilute HCl. The pet ether extract is dried (MgSO4), evaporated and fractionated at 760mm. [Walton & Waugh J Organomet Chem 37 45 1972, Beilstein 4 IV 3950.]

Bis(trimethylsilyl)acetylene Preparation Products And Raw materials

Raw materials

Chlorotrimethylsilane Tetrahydrofuran Copper(I) chloride Acetylene Bromoethane Magnesium

Preparation Products

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View Lastest Price from Bis(trimethylsilyl)acetylene manufacturers

Henan Aochuang Chemical Co.,Ltd.
Product
Bis(trimethylsilyl)acetylene 14630-40-1
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
98%
Supply Ability
1ton
Release date
2022-09-29
Zhuozhou Wenxi import and Export Co., Ltd
Product
Bis(trimethylsilyl)acetylene 14630-40-1
Price
US $15.00-10.00/KG
Min. Order
1KG
Purity
99%+ HPLC
Supply Ability
Monthly supply of 1 ton
Release date
2021-07-10
Zhuozhou Wenxi import and Export Co., Ltd
Product
Bis(trimethylsilyl)acetylene 14630-40-1
Price
US $15.00-10.00/KG
Min. Order
1KG
Purity
99%+ HPLC
Supply Ability
Monthly supply of 1 ton
Release date
2021-07-08

14630-40-1, Bis(trimethylsilyl)acetyleneRelated Search:

Bis(trimethylsilyl)sulfate BIS(TRIMETHYLSILYLMETHYL)AMINE BIS(TRIMETHYLSILYLMETHYL)DICHLOROSILANE BIS(PHENYLETHYNYL)DIMETHYLSILANE 1,4-BIS(TRIMETHYLSILYL)-1,3-BUTADIYNE BIS(DIETHYLAMINO)DIMETHYLSILANE bis(4-broMophenyl)-diphenyl-silane bis(4-broMophenyl)diMethylsilane BIS(TRICHLOROSILYLETHYL)BENZENE,TECH-95 BIS(METHYLDIETHOXYSILYLPROPYL)AMINE Bis(trimethylsilyl)methane Tetramethylsilane Bis(trimethylsilyl)acetylene Trimethylsilylacetylene (BIS(TRIMETHYLSILYL)ACETYLENE)(HEXAFLUO&,(bis(trimethylsilyl)acetylene)(hexafluoro-acetyla (TRIMETHYLSILYL)ACETYLENE-13C2 [BIS(TRIMETHYLSILYL)ACETYLENE](HEXAFLUOROACETYLACETONATO)COPPER(I) Bis(trimethylsilyl)acetylene-bis(cyclopentadienyl)(pyridine)zirconium,Bis(cyclopentadienyl)zirconium bis(trimethylsilyl)acetylene pyridine complex

  • BIS(TRIMETHYLSILYL)ACETYLENE
  • BSTMA
  • BTMSA
  • Bis(trimethylsilyl)acetylene 99%
  • 1,2-BIS-TRIMETHYLSILANYL-ETHYNE
  • TIMTEC-BB SBB008997
  • ICLA-002
  • 1,2-Bis(trimethylsilyl)acetylene
  • 1,2-Bis(trimethylsilyl)ethyne
  • 1,2-ethynediylbis[trimethyl-silan
  • 1,2-ethynediylbis[trimethyl-Silane
  • 2,5-Disilahex-3-yne, 2,2,5,5-tetramethyl-
  • Acetylene, bis(trimethylsilyl)-
  • Bis(trimethylsilyl)ethyne
  • Silane, 1,2-ethynediylbis*trimethyl-
  • Trimethyl[(trimethylsilyl)ethynyl]silane
  • BIS-(TRIMETHYLSILYL)ACETYLENE, 98%BIS-(TRIMETHYLSILYL)ACETYLENE, 98%BIS-(TRIMETHYLSILYL)ACETYLENE, 98%
  • Bis(trimethylsilyl)acetylene(BTMSA)
  • Bis(trimethylsilyl)acetylene,min.97%
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  • Ethynylbistrimethylsilanel
  • Bis(trimethylsilyl)acetylene,99%
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  • Bis(trimethylsilyl)acetylene &gt
  • Bis(trimethylsilyl)acetylene, 98%, for synthesis
  • TIANFU-CHEM Bis(trimethylsilyl)acetylene 14630-40-1
  • 3-Metbis(Trimethylsilyl) Acetylene
  • Double (trimethylmethsilyl) acetylene
  • DK079
  • DK080
  • 14630-40-1
  • C8H18Si2
  • CH33SiCCSiCH33
  • CH33SiC8801CSiCH33
  • Building Blocks
  • Alkynes
  • Organic Building Blocks
  • Internal
  • Ethynylsilanes
  • Si-(C)4 Compounds
  • Acetylenes
  • Functionalized Acetylenes
  • Silicon Compounds (for Synthesis)
  • Si (Classes of Silicon Compounds)
  • Alkynes
  • Building Blocks
  • Chemical Synthesis
  • Internal
  • Organic Building Blocks
  • organosilicon compounds
  • Industrial/Fine Chemicals
  • Acetylenes
  • Ethynylsilanes
  • Functionalized Acetylenes
  • Si (Classes of Silicon Compounds)
  • Si-(C)4 Compounds