19920-02-6

Basic information

• Product Name: Ethanone, tetrakis(4-methylphenyl)-
• CAS NO: 19920-02-6
• Molecular Formula: C30H28O
• Molecular Weight: 404.552
• Mol File: 19920-02-6.mol
• Article Data: 6

Chemical Properties

• CAS DataBase Reference: Ethanone, tetrakis(4-methylphenyl)-(CAS DataBase Reference)
• NIST Chemistry Reference: Ethanone, tetrakis(4-methylphenyl)-(19920-02-6)
• EPA Substance Registry System: Ethanone, tetrakis(4-methylphenyl)-(19920-02-6)

Safety Data

• Hazardous Substances Data: 19920-02-6(Hazardous Substances Data)

Upstream product

• 611-97-2 bis(p-methylphenyl)-methanone 
• 5831-43-6 1,1,2,2-tetrakis(4-methylphenyl)ethylene 
• 56-23-5 tetrachloromethane 
• 913-86-0 tetra(4-methylphenyl)-1,2-ethanediol 

Downstream Products

• 859776-87-7 1,2,2,2-tetra-p-tolyl-ethanol 
• 5831-43-6 1,1,2,2-tetrakis(4-methylphenyl)ethylene 
• 40673-57-2 1,1,2,2-tetra(p-tolyl)ethane 
• 16845-02-6 tri-p-tolylmethane 
• 99-94-5 p-Toluic acid 
• 3247-00-5 tris(4-methylphenyl)methanol 

Relevant articles and documents

Tetraarylethylenes from Diarylmethanones and Hexachlorodisilane: The “Sila-McMurry” Reaction

Hexachlorodisilane reacts with diarylmethanones (aryl=C6H5, 4-MeC6H4, 4-tBuC6H4, 4-ClC6H4, 4-BrC6H4) to furnish the corresponding tetraarylethylenes in good yields. The reductive conversion requires temperatures of about 160 °C and reaction times of 60–72 h. In the initial step, the Lewis-basic carbonyl groups likely generate low-valent [SiCl2] as an analogue of [TiCl2] in the classical McMurry reaction. The coupling sequence further proceeds via benzopinacolones, which have been isolated as key intermediates.

Catalytic epoxidation of hindered olefins with dioxygen. Fast oxygen atom transfer to olefin cation radicals from nitrogen oxides

Hindered olefins are efficiently converted to epoxides by dioxygen at 25°C in dichloromethane containing catalytic amounts of nitrogen oxides (NO2, NO+, NO, etc.). Nitrogen dioxide also effects the direct (stoichiometric) epoxidation of the same hindered olefins. Olefin cation radicals are spectrally identified as the first observable intermediate, and separate experiments confirm the facile transfer of an oxygen atom from nitrogen dioxide to olefin cation radicals to produce epoxides. At low temperature (-78°C), the epoxidation is rapidly initiated by added 1-electron oxidants such as tris(2,4-dibromophenyl)amine cation radical and nitrosonium (NO+). Scheme 3 presents the complete sequence of redox changes that are mediated by the nitrogen oxides in the catalytic conversion of hindered olefins to epoxides via the cation radical. The deliberate irradiation of the charge-transfer absorption band of the corresponding olefin electron donor-acceptor complexes with tetranitromethane also establishes the formation of epoxides to occur via the same reactive pair, i.e., the olefin cation radical and NO2. The mechanistic implication of rapid oxygen atom transfer to olefin cation radicals is underscored in the general consideration of catalytic epoxidations with dioxygen.

Novel reductive couplinog-rearrangement of carbonyl compounds with metal/Lewis acid under irradiation of ultrasonic wave

Novel reductive coupling-rearrangement of carbonyl compounds such as benzophenones with Al or Zn/ AlCl3 in CH3CN under irradiation of ultrasonic wave gave benzopinacolones via epoxides in good yields.