|
|
| | 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;tetravinyl-tetramethylcyclo-tetrasiloxane;2,4,6,8-TETRAMETHYLTETRAVINYLCYCLOTETRASILOXANE;1,3,5,7-TETRAVINYLTETRAMETHYLCYCLOTETRASILOXANE;METHYLVINYLCYCLOSILOXANE;2,4,6,8-TETRAMETHYL2,4,6,8-TETRAVINYLCYCLO-TETRASILOXANE 99%;2,4,6,8-Tetravinyl-2,4,6,8-tetramethylcyclotetrasiloxane;Vinylmethylcyclosiloxane | | 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 |  |
| | 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 | | Fp | 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) |
| Hazard Codes | Xi | | Risk Statements | 36 | | Safety Statements | 26-36 | | WGK Germany | 1 | | RTECS | GZ4550000 | | F | 10 | | TSCA | Yes | | HS Code | 29319090 |
| | 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-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. | | 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. | | 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 Preparation Products And Raw materials |
|