CAS No.2627-95-4,Divinyltetramethyldisiloxane Suppliers

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Basic Information

Molecular Structure:
CAS No.:	2627-95-4
Name:	Divinyltetramethyldisiloxane
Article Data:	18

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

Synthetic route

: 18243-27-1
dimethylvinylsilane

: 2627-95-4
tetramethyldivinyldisiloxane

Conditions

Conditions	Yield
With sodium hydroxide at 68℃; for 4h;	96%

: 5356-83-2
ethoxydimethylvinylsilane

: 1351415-92-3
(2-methylallyl)-dimethylvinylsilane

: 2627-95-4
tetramethyldivinyldisiloxane

Conditions

Conditions	Yield
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

Conditions	Yield
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

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

...Expand

: 60-29-7
diethyl ether

: 1719-58-0
Chlorodimethylvinylsilane

: 2627-95-4
tetramethyldivinyldisiloxane

Conditions

Conditions	Yield
With hydrogenchloride

: 5356-83-2
ethoxydimethylvinylsilane

: 67-64-1
acetone

: 2627-95-4
tetramethyldivinyldisiloxane

Conditions

Conditions	Yield
With hydrogenchloride

: 1719-58-0
Chlorodimethylvinylsilane

: 2627-95-4
tetramethyldivinyldisiloxane

Conditions

Conditions	Yield
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

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;

...Expand

: 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

Conditions	Yield
for 2h;

...Expand

: 78-08-0
Triethoxyvinylsilane

: 2627-95-4
tetramethyldivinyldisiloxane

Conditions

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

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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 C₈H₁₈OSi₂and 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,