57669-14-4

Basic information

• Product Name: Methylium, (4-methylphenyl)-
• CAS NO: 57669-14-4
• Molecular Formula: C8H9
• Molecular Weight: 105.159
• Mol File: 57669-14-4.mol
• Article Data: 7

Chemical Properties

• CAS DataBase Reference: Methylium, (4-methylphenyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Methylium, (4-methylphenyl)-(57669-14-4)
• EPA Substance Registry System: Methylium, (4-methylphenyl)-(57669-14-4)

Safety Data

• Hazardous Substances Data: 57669-14-4(Hazardous Substances Data)

Upstream product

• 106-42-3 para-xylene 
• 28965-62-0 dimethylsilanylium 
• 6711-19-9 benzylium cation 
• 108-88-3 toluene 
• 64710-12-9 dimethylfluoronium ion 
• 60-15-1 2-amino-1-phenylpropane 
• 104-82-5 4-Methylbenzyl chloride 
• 104-81-4 4-Methylbenzyl bromide 

Downstream Products

• 106-42-3 para-xylene 
• 28965-62-0 dimethylsilanylium 
• 128408-23-1 C₉H₇F₄O⁽¹⁺⁾ 
• 104-82-5 4-Methylbenzyl chloride 
• 128408-22-0 C₉H₇ClF₃O⁽¹⁺⁾ 
• 128408-25-3 C₉H₇ClF₃S⁽¹⁺⁾ 

Relevant articles and documents

Kinetic hydricity of silane hydrides in the gas phase

Herein, gas phase studies of the kinetic hydricity of a series of silane hydrides are described. An understanding of hydricity is important as hydride reactions figure largely in many processes, including organic synthesis, photoelectrocatalysis, and hydrogen activation. We find that hydricity trends in the gas phase differ from those in solution, revealing the effect of solvent. Calculations and further experiments, including H/D studies, were used to delve into the reactivity and structure of the reactants. These studies also represent a first step toward systematically understanding nucleophilicity and electrophilicity in the absence of solvent.

Site of Gas-phase Methylation of 1-Phenyl-2-aminopropane

The regioselectivity of methyl cation transfer from (CH3)2F(1+), (CH3)2Cl(1+) and (CH3)3O(1+) to 1-phenyl-2-aminopropane was studied by Fourier transform ion cyclotron resonance in combination with collision-induced dissociation and neutralization-reionization mass spectrometry of the stable (1+) ions formed in a chemical ionization source.The (CH3)2F(1+) ion transfers a methyl cation to the NH2 group and the phenyl ring with almost equal probability.Predominant CH3(1+) transfer to the NH2 group is observed for the (CH3)2Cl(1+) ion whereas the (CH3)3O(1+) ion reacts almost exclusively at the amino group.The preference for m ethylation at NH2 is discussed in terms of a lower methyl cation affinity of the phenyl ring than of the amino group and the existence of an energy barrier for methylation of the phenyl moiety.

Precise Determination of Stabilities of Primary, Secondary, and Tertiary Silicenium Ions from Kinetics and Equilibria of Hydride-Transfer Reactions in the Gas Phase. A Quantitative Comparison of the Stabilities of Silicenium and Carbonium Ions in the Gas Phase

Fourier transform ion cyclotron resonance spectroscopy has been used to examine kinetics and equilibria of hydride-transfer reactions of methyl-substituted silanes with various hydrocarbons having well-established gas-phase hydride affinities.The derived hydride affinities, D(R3Si(1+)-H(1-)), for the silicenium ions SiMeH2(1+), SiMe2H(1+), and SiMe3(1+) are 245.9, 230.1, and 220.5 kcal/mol, respectively, to be compared with the values of 270.5, 251.5, and 233.6 kcal/mol for the corresponding carbonium ions.This indicates that the silicenium ions are significantly more stable than the corresponding carbonium ions in the gas phase with H(1-) as a reference base.