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Triphenylsilanol
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Name

Triphenylsilanol

 EINECS 212-339-3
CAS No. 791-31-1 Density 1.13 g/cm3
PSA 20.23000 LogP 1.64580
Solubility reacts with water Melting Point 150-153 °C(lit.)
Formula C18H16OSi Boiling Point 388.6 °C at 760 mmHg
Molecular Weight 276.41 Flash Point 188.8 °C
Transport Information N/A Appearance White crystal
Safety 26-36 Risk Codes 36/37/38
Molecular Structure Molecular Structure of 791-31-1 (Triphenylsilanol) Hazard Symbols IrritantXi
Synonyms

Silanol,triphenyl- (8CI,9CI);Hydroxytriphenylsilane;LS 6400;NSC 12564;Triphenylhydroxysilane;Triphenylsilyl hydroxide;Z 6800;

Article Data 196

Triphenylsilanol Synthetic route

789-25-3

HSiPh3

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With water In acetone at 20℃; for 5h;99%
With 2,2,2-Trifluoroacetophenone; dihydrogen peroxide In acetonitrile; tert-butyl alcohol for 0.5h; Time; Green chemistry;99%
With water at 20℃; for 2.83333h;99%

tris(triphenylsiloxy)iron

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With H2O; HCl In water; acetone stirring (room temp., 5 min); evapn. in air, extn. (CCl4, 70°C), pptn. on evapn.; IR spectroscopy;99%

9H2O*6C4H12N(1+)*H(1+)*Sb5Mo18O66(7-)

789-25-3

HSiPh3

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With tert.-butylhydroperoxide In acetonitrile at 50℃; for 12h;98.3%
789-25-3

HSiPh3

A

1333-74-0

hydrogen

B

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With water In acetone at 25℃; for 6h; Catalytic behavior; Mechanism;A n/a
B 98%
With water; silver nitrate at 24.84℃; for 0.5h;A 45%
B 49%
16527-35-8

sodium triphenylsilanolate

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With CH3COOH In acetic acid97%

ethoxy(triphenylsilyl)keten

A

791-31-1

triphenylhydroxysilane

B

W(CO)6

W(CO)6

Conditions
ConditionsYield
With (CO)5WC(OEt)SiPh3 In diethyl ether at 80 - 100℃; for 1h; Product distribution;A 96%
B n/a

(CO)5WC(OEt)SiPh3

A

14040-11-0

tungsten hexacarbonyl

B

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With carbon monoxide In diethyl ether High Pressure; under dried N2; addn. of N-methylbenzimine at 25°C to a soln. of W-complex (CO-pressure: 50 atm); stirring for 2 d at room temp., then for 1-2 h at 80-100°C; vac.-evapn. until dryness; residue dissolved in petroleum ether/ether; chromy. (silica gel/petroleum ether/ether); recrystn. from petroleum ether; elem. anal.;A n/a
B 96%
With carbon monoxide In pentane High Pressure; under dried N2; addn. of N-methylbenzimine at 25°C to a soln. of W-complex (CO-pressure: 50 atm); stirring for 2 d at room temp., then for 1-2 h at 80-100°C; vac.-evapn. until dryness; residue dissolved in petroleum ether/ether; chromy. (silica gel/petroleum ether/ether); recrystn. from petroleum ether; elem. anal.;A n/a
B 96%

(CO)5CrC(OEt)SiPh3

A

199620-14-9, 13007-92-6

chromium(0) hexacarbonyl

B

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With carbon monoxide In diethyl ether High Pressure; under dried N2; addn. of N-methylbenzimine at 25°C to a soln. of W-complex (CO-pressure: 50 atm); stirring for 2 d at room temp., then for 1-2 h at 80-100°C; vac.-evapn. until dryness; residue dissolved in petroleum ether/ether; chromy. (silica gel/petroleum ether/ether); recrystn. from petroleum ether; elem. anal.;A n/a
B 96%
With carbon monoxide In pentane High Pressure; under dried N2; addn. of N-methylbenzimine at 25°C to a soln. of W-complex (CO-pressure: 50 atm); stirring for 2 d at room temp., then for 1-2 h at 80-100°C; vac.-evapn. until dryness; residue dissolved in petroleum ether/ether; chromy. (silica gel/petroleum ether/ether); recrystn. from petroleum ether; elem. anal.;A n/a
B 96%

(CO)5MoC(OEt)SiPh3

A

13939-06-5, 199620-15-0

molybdenum hexacarbonyl

B

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With carbon monoxide In diethyl ether High Pressure; under dried N2; addn. of N-methylbenzimine at 25°C to a soln. of W-complex (CO-pressure: 50 atm); stirring for 2 d at room temp., then for 1-2 h at 80-100°C; vac.-evapn. until dryness; residue dissolved in petroleum ether/ether; chromy. (silica gel/petroleum ether/ether); recrystn. from petroleum ether; elem. anal.;A n/a
B 96%
With carbon monoxide In pentane High Pressure; under dried N2; addn. of N-methylbenzimine at 25°C to a soln. of W-complex (CO-pressure: 50 atm); stirring for 2 d at room temp., then for 1-2 h at 80-100°C; vac.-evapn. until dryness; residue dissolved in petroleum ether/ether; chromy. (silica gel/petroleum ether/ether); recrystn. from petroleum ether; elem. anal.;A n/a
B 96%
1450-23-3

hexaphenyldisilane

791-31-1

triphenylhydroxysilane

Conditions
ConditionsYield
With 1% Au/TiO2; water In ethyl acetate at 55℃; for 5h;92%

Triphenylsilanol Chemical Properties

IUPAC Name: hydroxy(triphenyl)silane 
Empirical Formula: C18H16OSi
Molecular Weight: 276.4045g/mol
EINECS: 212-339-3 
Structure of Silanol,1,1,1-triphenyl- (CAS NO.791-31-1):

Index of Refraction: 1.628
Molar Refractivity: 86.46 cm3
Molar Volume: 243.4 cm3
Polarizability: 34.27×10-24cm3
Surface Tension: 44.3 dyne/cm
Density: 1.13 g/cm3
Flash Point: 188.8 °C
Enthalpy of Vaporization: 67.28 kJ/mol 
Melting Point: 150-153 °C(lit.)
Boiling Point: 388.6 °C at 760 mmHg
Vapour Pressure: 9.79E-07 mmHg at 25°C 
Water Solubility: reacts
Sensitive Air: Sensitive 
Product Categories: Si (Classes of Silicon Compounds);Silanols;Si-O Compounds;Phenyl Silanes 
Canonical SMILES: C1=CC=C(C=C1)[Si](C2=CC=CC=C2)(C3=CC=CC=C3)O
InChI: InChI=1S/C18H16OSi/c19-20(16-10-4-1-5-11-16,17-12-6-2-7-13-17)18-14-8-3-9-15-18/h1-15,19H
InChIKey: NLSXASIDNWDYMI-UHFFFAOYSA-N

Triphenylsilanol Uses

 Silanol,1,1,1-triphenyl- (791-31-1) is used for pharmaceutical intermediates or other synthetic polymer.

Triphenylsilanol Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intravenous 180mg/kg (180mg/kg)   U.S. Army Armament Research & Development Command, Chemical Systems Laboratory, NIOSH Exchange Chemicals. Vol. NX#04018,

Triphenylsilanol Consensus Reports

Reported in EPA TSCA Inventory.

Triphenylsilanol Safety Profile

Hazard Codes: IrritantXi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.
WGK Germany: 1
RTECS: VV4325500
F: 21
TSCA: Yes
HS Code: 29310095

Triphenylsilanol Specification

 Silanol,1,1,1-triphenyl- , its cas register number is 791-31-1. It also can be called 4-16-00-01480 (Beilstein Handbook Reference) ; AI3-51277 ; Hydroxytriphenylsilane ; NSC 12564 ; Silane, (hydroxytriphenyl)- ; Triphenylhydroxysilane ;
 Triphenylsilanol . Silanol,1,1,1-triphenyl- (CAS NO.791-31-1) is a white crystal.

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