2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane Chemical Properties

Melting point:

−44 °C (dec.)(lit.)

Boiling point:

111-112 °C10 mm Hg(lit.)

Density 

0.997 g/mL at 25 °C(lit.)

vapor pressure 

93.5Pa at 25℃

refractive index 

n20/D 1.435

Flash point:

210 °F

storage temp. 

Keep in dark place,Sealed in dry,Room Temperature

solubility 

Miscible with most organic solvents.

form 

liquid

Specific Gravity

0.998

color 

Colorless to Almost colorless

Water Solubility 

7μg/L at 23℃

Hydrolytic Sensitivity

4: no reaction with water under neutral conditions

BRN 

1807272

LogP

6.47

CAS DataBase Reference

2554-06-5(CAS DataBase Reference)

NIST Chemistry Reference

2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane(2554-06-5)

EPA Substance Registry System

Cyclotetrasiloxane, 2,4,6,8-tetraethenyl-2,4,6,8-tetramethyl- (2554-06-5)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36

Safety Statements 

26-36

WGK Germany 

1

RTECS 

GZ4550000

F 

10

TSCA 

Yes

HS Code 

29319090

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane Usage And Synthesis

Chemical Properties

Colorless transparent liquid

Physical properties

bp 224–224.5 °C.

Uses

2,4,6,8-Tetraethenyl-2,4,6,8-tetramethylcyclotetrasiloxane (1) (D4V) and the trimer, 2,4,6-triethenyl-2,4,6- trimethylcyclotrisiloxane (2) (D3V) are the two commercially available cyclic polyvinylmethylsiloxanes. D4 V is used as a vinyl donor in the palladium-catalyzed vinylation of aryl halides and as a building block in polymer chemistry and dendrimer synthesis. The palladium-catalyzed vinylation of substituted aryl halides using D4 V is a general and mild method for the preparation of a variety of substituted styrenes or dienes.It is widely used as reagent for the vinylation of aryl halides and building block for carbosilane dendrimers.

Uses

2,4,6,8-Tetramethyl-2,4,6,8-tetravinylcyclotetrasiloxane is used as an intermediate in organic synthesis. It is used in the preparation of 4-vinyl-benzoic acid ethyl ester. Further, it is used to prepare styrene derivatives by cross-coupling with aryl bromide in the presence of palladium catalyst.

General Description

In the presence of a Pd catalyst, this reagent cross-couples with aryl bromides to give styrene derivatives.

Hazard

Low toxicity by ingestion and inhalation.

Flammability and Explosibility

Non flammable

Purification Methods

A 7mL sample can be distilled in a small Vigreux column (p 11) at atmospheric pressure without polymerisation or decomposition. It is soluble in cyclohexane. [Kantor et al. J Am Chem Soc 77 1685 1955, Beilstein 4 IV 4184.]

2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane (2554-06-5)Related Product Information

• Decamethylcyclopentasiloxane
• 1,1,3,3-Tetramethyldisiloxane
• Vinyltris(methylethylketoxime)silane
• Vinylmethyldimethoxysilane
• Methyltris(methylethylketoxime)silane
• DODECAMETHYLCYCLOHEXASILOXANE
• Hexamethylcyclotrisiloxane
• 1,1,3,3,5,5-hexamethyl-1,3,5-trisilacyclohexane
• Poly(dimethylsiloxane)
• Hexamethyldisiloxane
• Octamethylcyclotetrasiloxane
• 1,1,3,3,5,5-HEXAMETHYLTRISILOXANE
• PLATINUM CARBONYL CYCLOVINYLMETHYLSILOXANE COMPLEX
• 2,4,6,8-Tetramethylcyclotetrasiloxane
• 1,3,5,7-Tetravinyl-1,3,5,7-tetramethylcyclotetrasiloxane,2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane
• 2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane
• HEPTAMETHYL CYCLOTETRASILOXANE
• 1,1,3,3,5,5,7,7-OCTAMETHYLTETRASILOXANE