Triphenylsilanol
Synonym(s):Hydroxytriphenylsilane
- CAS NO.：791-31-1
- Empirical Formula: C18H16OSi
- Molecular Weight: 276.4
- MDL number: MFCD00002102
- EINECS: 212-339-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-12-03 18:03:33
What is Triphenylsilanol?
Chemical properties
White crystal
The Uses of Triphenylsilanol
Triphenylsilanol is used as a water surrogate for regioselective Pd catalyzed allylations. A thick on germanium substrates have been produced by the electron bombardment of an evaporated thin film of triphenylsilanol.
Definition
ChEBI: An organosilanol in which silicon is bonded to a single hydroxy function and to three phenyl groups.
Purification Methods
It is purified by dissolving in pet ether, passing through an Al2O3 column, eluting thoroughly with CCl4 to remove impurities and then eluting the silanol with MeOH. Evaporation gives crystals with m 153-155o. It can be recrystallised from pet ether, CCl4 or from *benzene or Et2O/pet ether (1:1). It has also been recrystallised by partial freezing from the melt to constant melting point. [George & Gilman J Am Chem Soc 81 3288 1959, IR: Tatlock & Rochow J Org Chem 17 1555 1952 and Richards & Thompson J Chem Soc 124 1949, Beilstein 16 IV 1480.]
Properties of Triphenylsilanol
| Melting point: | 150-153 °C (lit.) |
| Boiling point: | 389 °C [760mmHg] |
| Density | 1.13 |
| refractive index | 1.628 |
| Flash point: | >200°C |
| storage temp. | Inert atmosphere,Room Temperature |
| form | Powder |
| pka | 13.39±0.58(Predicted) |
| color | white |
| Water Solubility | reacts |
| Sensitive | Air Sensitive |
| Hydrolytic Sensitivity | 4: no reaction with water under neutral conditions |
| BRN | 985007 |
| CAS DataBase Reference | 791-31-1(CAS DataBase Reference) |
| NIST Chemistry Reference | Silanol, triphenyl-(791-31-1) |
| EPA Substance Registry System | Silanol, triphenyl- (791-31-1) |
Safety information for Triphenylsilanol
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up. |
Computed Descriptors for Triphenylsilanol
| InChIKey | NLSXASIDNWDYMI-UHFFFAOYSA-N |
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