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Divinyltetramethyldisiloxane

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Name

Divinyltetramethyldisiloxane

EINECS 220-099-6
CAS No. 2627-95-4 Density 0.813 g/cm3
PSA 9.23000 LogP 2.86360
Solubility insoluble in water Melting Point -99 °C(lit.)
Formula C8H18OSi2 Boiling Point 138.999 °C at 760 mmHg
Molecular Weight 186.401 Flash Point 33.325 °C
Transport Information UN 1993 3/PG 2 Appearance Colorless or yellowish transparent liquid
Safety 16-26-36-37/39 Risk Codes 11-36/37/38
Molecular Structure Molecular Structure of 2627-95-4 (Divinyltetramethyldisiloxane) Hazard Symbols FlammableF,IrritantXi
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;

Article Data 18

Divinyltetramethyldisiloxane Synthetic route

18243-27-1

dimethylvinylsilane

2627-95-4

tetramethyldivinyldisiloxane

Conditions
ConditionsYield
With sodium hydroxide at 68℃; for 4h;96%
5356-83-2

ethoxydimethylvinylsilane

1351415-92-3

(2-methylallyl)-dimethylvinylsilane

2627-95-4

tetramethyldivinyldisiloxane

Conditions
ConditionsYield
With water; scandium tris(trifluoromethanesulfonate) In acetonitrile at 20℃; for 1h;94%
5356-83-2

ethoxydimethylvinylsilane

A

2627-95-4

tetramethyldivinyldisiloxane

B

79238-55-4

2-methyl-3-butene-2-ol, sodium salt

Conditions
ConditionsYield
With water; sodium hydroxide at 20℃;A 60%
B 40%
17877-23-5

triisopropylsilanol

1351415-92-3

(2-methylallyl)-dimethylvinylsilane

A

2627-95-4

tetramethyldivinyldisiloxane

B

1351415-84-3

1,1-dimethyl-3,3,3-triisopropyl-1-vinyldisiloxane

Conditions
ConditionsYield
With n-heptan1ol; scandium tris(trifluoromethanesulfonate) In water; acetonitrile at 22℃; for 0.5h;A 19%
B 58%
60-29-7

diethyl ether

1719-58-0

Chlorodimethylvinylsilane

2627-95-4

tetramethyldivinyldisiloxane

Conditions
ConditionsYield
With hydrogenchloride
5356-83-2

ethoxydimethylvinylsilane

67-64-1

acetone

2627-95-4

tetramethyldivinyldisiloxane

Conditions
ConditionsYield
With hydrogenchloride
1719-58-0

Chlorodimethylvinylsilane

2627-95-4

tetramethyldivinyldisiloxane

Conditions
ConditionsYield
With lithium oxide In diethyl ether Yield given;
With water
857899-86-6

(1-hydrohexafluoroisobutenyloxy)trimethylsilane

1719-58-0

Chlorodimethylvinylsilane

A

dimethyl-(3,3,3-trifluoro-2-trifluoromethyl-propenyloxy)-vinyl-silane

B

1438-79-5

1,1,3,3,3-pentamethyl-1-vinyldisiloxane

C

2627-95-4

tetramethyldivinyldisiloxane

D

38755-76-9

dimethyl vinyl fluorosilane

Conditions
ConditionsYield
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;
206356-44-7

CF3C(O)CH(OSiMe2(C2H3))CF3

109-81-9

N-methyl-ethane-1,2-diamine

A

2627-95-4

tetramethyldivinyldisiloxane

B

CF3C(O)CH2(NCH2CH2NHMe)CF3

Conditions
ConditionsYield
for 2h;
78-08-0

Triethoxyvinylsilane

2627-95-4

tetramethyldivinyldisiloxane

Conditions
ConditionsYield
With [D]-sodium hydroxide; water-d2; palladium diacetate; sodium 4-iodo-benzoate at 30℃; for 20h;100 %Spectr.

Divinyltetramethyldisiloxane Specification

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%.

Divinyltetramethyldisiloxane can be prepared by dimethyl-vinyl-silane at the temperature of 68 °C

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%.

Divinyltetramethyldisiloxane can be used to produce 1,2-bis-(1,1,3,3-tetramethyl-3-vinyl-disiloxanyl)-ethene at the temperature of 80 °C

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,

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