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

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2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane Basic information

Product Name:
2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane
Synonyms:
  • s-tetramethyltetravinylcyclotetrasiloxane
  • Tetravinyltetramethylcyclotetrasiloxane
  • tetravinyl-tetramethylcyclo-tetrasiloxane
  • 2,4,6,8-TETRAMETHYL-2,4,6,8-TETRAVINYLCYCLOTETRASILOXANE
  • 2,4,6,8-TETRAMETHYLTETRAVINYLCYCLOTETRASILOXANE
  • 1,3,5,7-TETRAVINYLTETRAMETHYLCYCLOTETRASILOXANE
  • METHYLVINYLCYCLOSILOXANE
  • 2,4,6,8-TETRAMETHYL2,4,6,8-TETRAVINYLCYCLO-TETRASILOXANE 99%
CAS:
2554-06-5
MF:
C12H24O4Si4
MW:
344.66
EINECS:
219-863-1
Product Categories:
  • POSS IntermediatesPolymer Science
  • Silicone MonomersOrganometallic Reagents
  • Monomers
  • Organosilicon
  • POSS? Precursors and Intermediates
  • Silsesquioxanes: POSS? Nanohybrids
  • Si (Classes of Silicon Compounds)
  • Siloxanes
  • Si-O Compounds
Mol File:
2554-06-5.mol
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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)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36
Safety Statements 
26-36
WGK Germany 
1
RTECS 
GZ4550000
10
TSCA 
Yes
HS Code 
29319090

MSDS

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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 Supplier

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