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Tris(4-methylphenyl)methylium tetrafluoroborate, also known as trityl tetrafluoroborate, is a chemical compound with the formula C23H22BF4. It is a colorless crystalline solid that is widely used as a phase-transfer catalyst in organic synthesis. The compound consists of a central carbon atom bonded to three 4-methylphenyl groups and a tetrafluoroborate counterion. Tris(4-methylphenyl)methylium tetrafluoroborate is known for its stability, high solubility in organic solvents, and ability to facilitate various chemical reactions, such as alkylation, acylation, and esterification. Its unique structure and properties make it a valuable tool in the field of organic chemistry.

1650-48-2

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1650-48-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1650-48-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,5 and 0 respectively; the second part has 2 digits, 4 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1650-48:
(6*1)+(5*6)+(4*5)+(3*0)+(2*4)+(1*8)=72
72 % 10 = 2
So 1650-48-2 is a valid CAS Registry Number.

1650-48-2Relevant academic research and scientific papers

Carbon's Three-Center, Four-Electron Tetrel Bond, Treated Experimentally

Karim, Alavi,Schulz, Nils,Andersson, Hanna,Nekoueishahraki, Bijan,Carlsson, Anna-Carin C.,Sarabi, Daniel,Valkonen, Arto,Rissanen, Kari,Gr?fenstein, Jürgen,Keller, Sandro,Erdélyi, Máté

supporting information, p. 17571 - 17579 (2019/01/04)

Tetrel bonding is the noncovalent interaction of group IV elements with electron donors. It is a weak, directional interaction that resembles hydrogen and halogen bonding yet remains barely explored. Herein, we present an experimental investigation of the

Stabilities of trityl-protected substrates: The wide mechanistic spectrum of trityl ester hydrolyses

Horn, Markus,Mayr, Herbert

supporting information; experimental part, p. 7469 - 7477 (2010/09/11)

Ionization rates of para-substituted triphenylmethyl (trityl) acetates, benzoates, and para-nitrobenzoates have been determined in aqueous acetonitrile and aqueous acetone at 25 °C. Conventional and stoppedflow techniques have been used to evaluate rate constants ranging from 1.38 × 10-5 to 2.15 × 102S-1 by conductimetry and photospectrometry methods. The varying stabilities of the differently substituted tritylium ions account for a gradual change of reaction mechanism. Poorly stabilized carbocations are generated slowly by the ionization of their covalent precursors and trapped fast by water. Better stabilized carbocations are generated more rapidly and accumulate, so that ionization and trapping by water can be observed as separate steps in a single experiment. Finally, highly stabilized tritylium ions do not react with water, and only the rates of their formation could be measured. The ionization rate constants correlate linearly with Winstein's ionizing powers Y; the low slopes (0.17 + parameters is excellent for symmetrically substituted tritylium derivatives, deviations for unsymmetrically substituted systems are observed. The failing rate-equilibrium relationship between the rates of ionizations (log kion) and the stabilities of the carbocations in aqueous solution (pKR+) may be explained by the late " development of resonance between a p-amino group and the carbocationic center of the tritylium ion during the ionization process.

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