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: 2023-04-23 13:52:06

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.