Octaphenylsilsesquioxane supplier

Name
Octaphenylsilsesquioxane
EINECS
CAS No. 5256-79-1
Article Data18
CAS DataBase
Density 1.35g/cm³
Solubility
Melting Point >350 ºC
Formula C₄₈H₄₀O₁₂Si₈
Boiling Point 41.5°Cat760mmHg
Molecular Weight 1033.52
Flash Point
Transport Information
Appearance
Safety
Risk Codes
Molecular Structure
Hazard Symbols
Synonyms Octasilsesquioxane,octaphenyl- (6CI);Pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane, octaphenyl-(7CI,8CI,9CI);1,3,5,7,9,11,13,15-Octaphenylpentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane;MS0840;Molecular Silicas MS 0840;OctaPhenyl POSS;Octaphenylhexacyclooctasiloxane;Octaphenylsilsesquioxane;Phenyl-T8;
PSA 110.76000
LogP 3.02240

Synthetic route

: 2996-92-1
phenyl trimethylsiloxane

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With potassium hydroxide In water; acetone at 65℃; for 24h;	95.43%
Stage #1: phenyl trimethylsiloxane With hydrogenchloride; water In toluene for 2h; Stage #2: With potassium fluoride; 18-crown-6 ether In toluene Reflux; Removal of water;	72%

: C24H24O8Si4

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With N-benzyl-trimethylammonium hydroxide In methanol; benzene at 20℃; for 12h; Inert atmosphere;	95%

: 780-69-8
triethoxyphenylsilane

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With water; sodium hydroxide In toluene at 110℃; for 72h; Inert atmosphere;	81%
With sodium hydroxide In water; toluene at 110℃; for 72h; Inert atmosphere;	81%

: 98-13-5
Phenyltrichlorosilane

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With base Amberlite IRA 400 In ethanol	74%
Hydrolysis.und anschliessenden Umsetzung mit aethanol.KOH in Benzol;
With hydrogenchloride
With water; N-benzyl-trimethylammonium hydroxide

: 154354-98-0
2,4,6,8,10,12-hexahydroxy-2,4,6,8,10,12-hexaphenylcyclohexasiloxane

A: 5256-79-1
octaphenylsilsesquioxane

B: C72H60O18Si12

Conditions

Conditions	Yield
With triethylamine In acetone for 48h; Reflux;	A 65.8% B 9.5%

: C72H72O24Si12

A: 5256-79-1
octaphenylsilsesquioxane

B: C72H60O18Si12

Conditions

Conditions	Yield
With N-butylamine In acetone for 48h; Reflux;	A 5.9% B 55.7%

: 780-69-8
triethoxyphenylsilane

A: C72H60O18Si12

B: 5256-79-1
octaphenylsilsesquioxane

C: 18851-18-8
deca(phenyl)silsesquioxane

Conditions

Conditions	Yield
With tetrabutyl ammonium fluoride In dichloromethane; water for 48 - 72h; Mechanism; Inert atmosphere;	A n/a B n/a C 49%

...Expand

: 694-53-1
phenylsilane

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With caesium carbonate; N,N-dimethyl-formamide; trimethylamine at 20℃; for 24h; Catalytic behavior; Reagent/catalyst; Temperature; Schlenk technique;	39%

: 3450-18-8
tetraphenyltetrahydroxycyclotetrasiloxane

A: 5256-79-1
octaphenylsilsesquioxane

B: C72H60O18Si12

Conditions

Conditions	Yield
With triethylamine In acetone for 48h; Reagent/catalyst; Reflux;	A 36.8% B 19.6%

: 3047-74-3
phenylsilanetriol

A: 5256-79-1
octaphenylsilsesquioxane

B: C72H60O18Si12

Conditions

Conditions	Yield
With N-butylamine In acetone for 48h; Reflux;	A 32.8% B 9.4%

: 3450-18-8
tetraphenyltetrahydroxycyclotetrasiloxane

A: 5256-79-1
octaphenylsilsesquioxane

B: 18851-18-8
deca(phenyl)silsesquioxane

C: C72H60O18Si12

Conditions

Conditions	Yield
With dicyclohexyl-carbodiimide In acetone for 48h; Reflux;	A 24.5% B 8.1% C 12%

...Expand

: 3047-74-3
phenylsilanetriol

A: 5256-79-1
octaphenylsilsesquioxane

B: 18851-18-8
deca(phenyl)silsesquioxane

Conditions

Conditions	Yield
With triethylamine In acetone for 48h; Reflux;	A 22.5% B 6.7%

: 154354-98-0
2,4,6,8,10,12-hexahydroxy-2,4,6,8,10,12-hexaphenylcyclohexasiloxane

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With N-butylamine In acetone for 48h; Reflux;	18.6%

: C72H72O24Si12

A: 5256-79-1
octaphenylsilsesquioxane

B: 18851-18-8
deca(phenyl)silsesquioxane

C: C72H60O18Si12

Conditions

Conditions	Yield
With triethylamine In acetone for 48h; Reflux;	A 6.5% B 6.6% C 15.5%

...Expand

: 2996-92-1
phenyl trimethylsiloxane

A: dodecaphenylsilsesquioxane

B: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With diethylamine In water; acetone for 48h; Heating;	A 29.2 % Spectr. B 36.7 % Spectr.

: 3047-74-3
phenylsilanetriol

A: dodecaphenylsilsesquioxane

B: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With 1,4-butanediamine In acetone for 48h; Heating;

PhT-resin: PhT-resin

A: dodecaphenylsilsesquioxane

B: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With 1,4-butanediamine In acetone for 48h; Heating;

cyclic polysilanol (n=6 and 12): cyclic polysilanol (n=6 and 12)

A: dodecaphenylsilsesquioxane

B: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With 1,4-butanediamine In acetone for 48h; Heating;

: 444315-26-8
1,3,5,7,9,11,14-heptaphenyltricyclo[7.3.3.1(5,11)]heptasiloxane-endo-3,7,14-triol

: 98-13-5
Phenyltrichlorosilane

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With triethylamine In tetrahydrofuran Inert atmosphere;

: C48H40O12Si8*C16H36N(1+)*F(1-)

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
With trifluorormethanesulfonic acid In tetrahydrofuran for 12h;

: 591-51-5
phenyllithium

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1.1: diethyl ether / 2 h / -40 °C / Inert atmosphere; Schlenk technique 1.2: 0.5 h / -40 °C / Inert atmosphere; Schlenk technique 2.1: tetrabutyl ammonium fluoride / dichloromethane; water; tetrahydrofuran / 16 h View Scheme

: C21H38O4Si2

A: 5256-79-1
octaphenylsilsesquioxane

B: 18851-18-8
deca(phenyl)silsesquioxane

C: C72H60O18Si12

Conditions

Conditions	Yield
With tetrabutyl ammonium fluoride In tetrahydrofuran; dichloromethane; water for 16h;

...Expand

: sodium cis-1,3,5,7-tetraphenylcyclotetrasiloxanolate

: 5256-79-1
octaphenylsilsesquioxane

Conditions

Conditions	Yield
Multi-step reaction with 2 steps 1: acetic acid / water; tetrahydrofuran / 0.17 h 2: dicyclohexyl-carbodiimide / acetone / 48 h / Reflux View Scheme

: 5256-79-1
octaphenylsilsesquioxane

: 3809-28-7
octa-cyclohexyloctasilsesquioxane

Conditions

Conditions	Yield
With hydrogen; palladium on activated charcoal In acetic acid; ethyl acetate at 200℃; under 25840 Torr;	93%

: 1310-73-2
sodium hydroxide

: 5256-79-1
octaphenylsilsesquioxane

: sodium cis-1,3,5,7-tetraphenylcyclotetrasiloxanolate

Conditions

Conditions	Yield
With butan-1-ol for 24 - 48h; Heating / reflux;	92%

: 5256-79-1
octaphenylsilsesquioxane

: 75-36-5
acetyl chloride

: octakis(m-acetylphenyl)octasilsesquioxane

Conditions

Conditions	Yield
With aluminum (III) chloride In dichloromethane at 0℃; for 16h; Friedel-Crafts acylation; regioselective reaction;	90.2%
Stage #1: acetyl chloride With aluminum (III) chloride In carbon disulfide; dichloromethane at 0℃; for 0.25h; Friedel-Crafts Acylation; Schlenk technique; Inert atmosphere; Stage #2: octaphenylsilsesquioxane In carbon disulfide; dichloromethane at 0 - 20℃; for 24h; Friedel-Crafts Acylation; Schlenk technique; Inert atmosphere;	8 g

: 5256-79-1
octaphenylsilsesquioxane

: I8OPS

Conditions

Conditions	Yield
With Iodine monochloride In dichloromethane at -60 - 20℃; for 48h; Inert atmosphere;	90%

: 5256-79-1
octaphenylsilsesquioxane

: octa(para-iodophenyl)-silsesquioxane

Conditions

Conditions	Yield
With ClI*CH2Cl2 In dichloromethane at -40 - 20℃; for 24h;	90%
With Iodine monochloride In dichloromethane at -40 - 20℃; for 60h; Inert atmosphere;	40%
With Iodine monochloride In dichloromethane at 40℃;

: 5256-79-1
octaphenylsilsesquioxane

: 98-09-9
benzenesulfonyl chloride

: [m-(4-toluenesulfonyl)PhSiO1.5]8

Conditions

Conditions	Yield
With aluminum (III) chloride In dichloromethane at 0 - 20℃;	89%

: 79-37-8
oxalyl dichloride

: 5256-79-1
octaphenylsilsesquioxane

: octa(m-carboxyphenyl)silsesquioxane

Conditions

Conditions	Yield
Stage #1: oxalyl dichloride; octaphenylsilsesquioxane With aluminum (III) chloride In carbon disulfide; dichloromethane at -5 - 0℃; for 6h; Friedel Crafts acylation; Stage #2: With water In tetrahydrofuran; carbon disulfide; dichloromethane at 20℃; for 48h;	85%

: 5256-79-1
octaphenylsilsesquioxane

: C48H24Br16O12Si8

Conditions

Conditions	Yield
With ferric(III) bromide; bromine In dichloromethane at 20℃; for 24h; Inert atmosphere;	81%

: 5256-79-1
octaphenylsilsesquioxane

: sodium cis-1,3,5,7-tetraphenylcyclotetrasiloxanolate

Conditions

Conditions	Yield
With sodium hydroxide In butan-1-ol at 110℃; Inert atmosphere;	80%

: 5256-79-1
octaphenylsilsesquioxane

: C48H32Br8O12Si8

Conditions

Conditions	Yield
With bromine; iron(III) chloride In chloroform at 20℃; for 96h;	60%

: 41371-94-2, 14974-11-9, 96647-88-0
tris(ammonia)chromium tricarbonyl

: 5256-79-1
octaphenylsilsesquioxane

: 116745-93-8
(Si8O12(C6H5)8)Cr(CO)3

Conditions

Conditions	Yield
In 1,4-dioxane boiling mixt. of Si8O12(C6H5)8 and 2-fold excess of (NH3)3Cr(CO)3 for 7 h in dioxane; filtn., removal of solvent (vac.), preparative thin layer chromy. on SAl2O3 in 2:1 benzene-petroleum ether mixt., collecting yellow zone, reprecipitation from CH2Cl2 by heptane; elem. anal.;	20%

Octaphenylsilsesquioxane Specification

The Octaphenylsilsesquioxane with cas registry number of 5256-79-1, whose systematic name is 1,3,5,7,9,11,13,15-octaphenylpentacyclo[9.5.1.1~3,9~.1~5,15~.1~7,13~]octasiloxane. And it is also named 1,3,5,7,9,11,13,15-Octaphenylpentacyclo[9.5.1.1~3,9~.1~5,15~.1~7,13~]octasiloxan.

Physical properties about this chemical are: (1)#H bond acceptors: 12; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 8; (4)Polar Surface Area: 110.76 Å²; (5)Index of Refraction: 1.658; (6)Molar Refractivity: 280.48 cm³; (7)Molar Volume: 761 cm³; (8)Polarizability: 111.19×10^-24cm³; (9)Surface Tension: 47.4 dyne/cm.

You can still convert the following datas into molecular structure:
(1)SMILES:O1[Si]9(O[Si]4(O[Si]6(O[Si](O[Si]2(O[Si](O[Si](O[Si]1(O2)c3ccccc3)(O4)c5ccccc5)(O6)c7ccccc7)c8ccccc8)(O9)c%10ccccc%10)c%11ccccc%11)c%12ccccc%12)c%13ccccc%13;
(2)InChI:InChI=1/C48H40O12Si8/c1-9-25-41(26-10-1)61-49-62(42-27-11-2-12-28-42)52-65(45-33-17-5-18-34-45)54-63(50-61,43-29-13-3-14-30-43)56-67(47-37-21-7-22-38-47)57-64(51-61,44-31-15-4-16-32-44)55-66(53-62,46-35-19-6-20-36-46)59-68(58-65,60-67)48-39-23-8-24-40-48/h1-40H;
(3)InChIKey:KBXJHRABGYYAFC-UHFFFAOYAQ;
(4)Std. InChI:InChI=1S/C48H40O12Si8/c1-9-25-41(26-10-1)61-49-62(42-27-11-2-12-28-42)52-65(45-33-17-5-18-34-45)54-63(50-61,43-29-13-3-14-30-43)56-67(47-37-21-7-22-38-47)57-64(51-61,44-31-15-4-16-32-44)55-66(53-62,46-35-19-6-20-36-46)59-68(58-65,60-67)48-39-23-8-24-40-48/h1-40H ;
(5)Std. InChIKey:KBXJHRABGYYAFC-UHFFFAOYSA-N

Product Name

Octaphenylsilsesquioxane

Synthetic route

Octaphenylsilsesquioxane Specification

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