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| CAS No.: | 2627-95-4 |
|---|---|
| Name: | Divinyltetramethyldisiloxane |
| Molecular Structure: | |
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| Formula: | C8H18OSi2 |
| Molecular Weight: | 186.401 |
| Synonyms: | Disiloxane,1,1,3,3-tetramethyl-1,3-divinyl- (6CI,7CI,8CI);1,1,3,3-Tetramethyl-1,3-divinyldisiloxane;1,1'-Divinyltetramethyldisiloxane;1,3-Diethenyl-1,1,3,3-tetramethyldisiloxane;1,3-Divinyl-1,1,3,3-tetramethyldisiloxane;1,3-Divinyltetramethyldisiloxane;Bis(ethenyldimethylsilyl) ether;Tetramethyl-1,3-divinyldisiloxane;sym-Divinyltetramethyldisiloxane;sym-Tetramethyldivinyldisiloxane;Divinyltetramethyldisiloxane; |
| EINECS: | 220-099-6 |
| Density: | 0.813 g/cm3 |
| Melting Point: | -99 °C(lit.) |
| Boiling Point: | 138.999 °C at 760 mmHg |
| Flash Point: | 33.325 °C |
| Solubility: | insoluble in water |
| Appearance: | Colorless or yellowish transparent liquid |
| Hazard Symbols: |
 F, Xi
|
| Risk Codes: | 11-36/37/38 |
| Safety: | 16-26-36-37/39 |
| Transport Information: | UN 1993 3/PG 2 |
| PSA: | 9.23000 |
| LogP: | 2.86360 |
dimethylvinylsilane
tetramethyldivinyldisiloxane
| Conditions | Yield |
|---|---|
| With sodium hydroxide at 68℃; for 4h; | 96% |
ethoxydimethylvinylsilane
(2-methylallyl)-dimethylvinylsilane
tetramethyldivinyldisiloxane
| Conditions | Yield |
|---|---|
| With water; scandium tris(trifluoromethanesulfonate) In acetonitrile at 20℃; for 1h; | 94% |
ethoxydimethylvinylsilane
A
tetramethyldivinyldisiloxane
B
2-methyl-3-butene-2-ol, sodium salt
| Conditions | Yield |
|---|---|
| With water; sodium hydroxide at 20℃; | A 60% B 40% |
triisopropylsilanol
(2-methylallyl)-dimethylvinylsilane
A
tetramethyldivinyldisiloxane
B
1,1-dimethyl-3,3,3-triisopropyl-1-vinyldisiloxane
| Conditions | Yield |
|---|---|
| With n-heptan1ol; scandium tris(trifluoromethanesulfonate) In water; acetonitrile at 22℃; for 0.5h; | A 19% B 58% |
| Conditions | Yield |
|---|---|
| With hydrogenchloride |
| Conditions | Yield |
|---|---|
| With hydrogenchloride |
| Conditions | Yield |
|---|---|
| With lithium oxide In diethyl ether Yield given; | |
| With water |
(1-hydrohexafluoroisobutenyloxy)trimethylsilane
Chlorodimethylvinylsilane
B
1,1,3,3,3-pentamethyl-1-vinyldisiloxane
C
tetramethyldivinyldisiloxane
D
dimethyl vinyl fluorosilane
| Conditions | Yield |
|---|---|
| Stage #1: (1-hydrohexafluoroisobutenyloxy)trimethylsilane With cesium fluoride In diethylene glycol dimethyl ether at -10℃; for 2h; Stage #2: Chlorodimethylvinylsilane In diethylene glycol dimethyl ether at -10℃; for 2h; Further byproducts given; |
CF3C(O)CH(OSiMe2(C2H3))CF3
N-methyl-ethane-1,2-diamine
A
tetramethyldivinyldisiloxane
| Conditions | Yield |
|---|---|
| for 2h; |
| Conditions | Yield |
|---|---|
| With [D]-sodium hydroxide; water-d2; palladium diacetate; sodium 4-iodo-benzoate at 30℃; for 20h; | 100 %Spectr. |
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The Divinyltetramethyldisiloxane, with the CAS registry number 2627-95-4, is also known as Tetramethyl-1,3-divinyldisiloxane. It belongs to the product categories of Industrial/Fine Chemicals; Monomer; Si (Classes of Silicon Compounds); Siloxanes; Si-O Compounds; Vinylsilanes, Allylsilanes; Organosilicon compound. Its EINECS number is 220-099-6. This chemical's molecular formula is C8H18OSi2 and molecular weight is 186.40. What's more, its systematic name is 1,1,3,3-Tetramethyl-1,3-divinyldisiloxane. This chemical should be sealed and stored in a cool and dry place. This substance is used as raw materials for preparing vinyl polysiloxane, silica gel and vinyl silicone oil.
Physical properties of Divinyltetramethyldisiloxane are: (1)ACD/LogP: 3.053; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 3.05; (4)ACD/LogD (pH 7.4): 3.05; (5)ACD/BCF (pH 5.5): 123.08; (6)ACD/BCF (pH 7.4): 123.08; (7)ACD/KOC (pH 5.5): 1090.87; (8)ACD/KOC (pH 7.4): 1090.87; (9)#H bond acceptors: 1; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 4; (12)Polar Surface Area: 9.23 Å2; (13)Index of Refraction: 1.419; (14)Molar Refractivity: 57.742 cm3; (15)Molar Volume: 228.612 cm3; (16)Polarizability: 22.891×10-24cm3; (17)Surface Tension: 17.3 dyne/cm; (18)Density: 0.815 g/cm3; (19)Flash Point: 33.325 °C; (20)Enthalpy of Vaporization: 36.075 kJ/mol; (21)Boiling Point: 138.999 °C at 760 mmHg; (22)Vapour Pressure: 8.2 mmHg at 25°C.
Preparation: this chemical can be prepared by dimethyl-vinyl-silane at the temperature of 68 °C. This reaction will need reagent 20% aq. NaOH with the reaction time of 4 hours. The yield is about 96%.
Uses of Divinyltetramethyldisiloxane: it can be used to produce 1,2-bis-(1,1,3,3-tetramethyl-3-vinyl-disiloxanyl)-ethene at the temperature of 80 °C. It will need catalyst RuCl2(CO)3 with the reaction time of 48 hours. The yield is about 49%.
When you are using this chemical, please be cautious about it as the following:
This chemical is highly flammable, so you should keep it away from sources of ignition - No smoking. It is irritating to eyes, respiratory system and skin. In case of contact with eyes, you should rinse immediately with plenty of water and seek medical advice. When using it, you need wear suitable protective clothing, gloves and eye/face protection.
You can still convert the following datas into molecular structure:
(1)SMILES: C[Si](C)(C=C)O[Si](C)(C)C=C
(2)Std. InChI: InChI=1S/C8H18OSi2/c1-7-10(3,4)9-11(5,6)8-2/h7-8H,1-2H2,3-6H3
(3)Std. InChIKey: BITPLIXHRASDQB-UHFFFAOYSA-N
The toxicity data is as follows:
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| rat | LCLo | inhalation | 111gm/m3/1H (111000mg/m3) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD | National Technical Information Service. Vol. OTS0572673, |
| rat | LD50 | oral | > 10gm/kg (10000mg/kg) | BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION SKIN AND APPENDAGES (SKIN): HAIR: OTHER | National Technical Information Service. Vol. OTS0572676, |
