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Potassium, (triphenylmethyl)-, also known as triphenylmethylpotassium or (C6H5)3CK, is an organometallic compound consisting of a potassium atom bonded to a triphenylmethyl group. Potassium, (triphenylmethyl)- is a highly reactive and strong base, often used in organic synthesis as a nucleophile and a base. It is typically prepared by the reaction of potassium metal with triphenylmethane in an aprotic solvent, such as tetrahydrofuran (THF) or dimethoxyethane (DME). Due to its reactivity, it is sensitive to air and moisture, and must be handled under an inert atmosphere, such as nitrogen or argon. Triphenylmethylpotassium is commonly employed in the formation of carbon-carbon bonds, particularly in the Wittig reaction, where it acts as a key intermediate in the synthesis of alkenes.

1528-27-4

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1528-27-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1528-27-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,2 and 8 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1528-27:
(6*1)+(5*5)+(4*2)+(3*8)+(2*2)+(1*7)=74
74 % 10 = 4
So 1528-27-4 is a valid CAS Registry Number.

1528-27-4SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name potassium,diphenylmethylbenzene

1.2 Other means of identification

Product number -
Other names Tritylkalium

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:1528-27-4 SDS

1528-27-4Relevant academic research and scientific papers

Carbanion mechanisms XXI. Solution acidity of triphenylsilane

Buncel, Erwin,Venkatachalam

, p. 208 - 210 (2007/10/03)

Comparative acidity measurements have been performed between triphenylsilylpotassium and a series of arylmethanes by 1H-NMR in tetrahydrofuran: Ph3SiK + ArnCH4 - n ? Ph3SiH + ArnCH3 - nK Metalation of the arylmethane was complete in the case of Ph3CH (pKa 31.4) and Ph2CH2 (pKa 33.4) but with (p-CH3·C6H4)2CH2 (pKa 35.1) ～50% metalation of the di-p-tolymethane occurred, indicating that the two acids have equal pKa. No reaction occurred with 4-Ph·C6H4·CH3 (pKa 38.7). Thus pKa Ph3SiH ≈ 35.1 in THF. This represents the first solution measurement of the acidity of an organosilane.

METAL-STABILIZED CARBANIONS VI. FORMATION OF SOME ARYLMETHYL AND DIBENZOTROPENYL CARBANIONS COMPLEXED WITH TRICARBONYLCHROMIUM. A KINETIC AND A 13C NMR STUDY

Ceccon, Alberto,Gambaro, Alessandro,Venzo, Alfonso

, p. 209 - 222 (2007/10/02)

Rate constants have been measured for the α-metallation of some arylmethanes, of 5H-dibenzocycloheptene and its dihydro derivative, free and complexed with tricarbonylchromium, by potassium hydride in tetrahydrofuran in the presence of 18-crown-6 ether.The stable solutions of the complexed anions have been studied by 13C NMR spectroscopy.With the free ligands the kinetic acidity depends upon the structure to a great extent, but in the corresponding complexes the rates of metallation do not vary appreciably.On the basis of the 13C chemical shift data a close similarity is suggested between the electronic structures of the arylmethyl and dibenzotropenyl anions which would account for their very similar metallation rates.

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