18602-99-8

Basic information

• Product Name: Silyl, triphenyl-
• CAS NO: 18602-99-8
• Molecular Formula: C18H15Si
• Molecular Weight: 259.403
• Mol File: 18602-99-8.mol
• Article Data: 8

Chemical Properties

• CAS DataBase Reference: Silyl, triphenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Silyl, triphenyl-(18602-99-8)
• EPA Substance Registry System: Silyl, triphenyl-(18602-99-8)

Safety Data

• Hazardous Substances Data: 18602-99-8(Hazardous Substances Data)

Upstream product

• 1450-23-3 hexaphenyldisilane 
• 80011-25-2 tetrakis(pyrophosphito)diplatinum(II) 
• 789-25-3 HSiPh₃ 
• 25087-41-6 neophyl radical 
• 791-30-0 triphenylsilyl-lithium 
• 1048-08-4 tetraphenylsilane 
• 4916-43-2 bis(triphenylsilyl)ketone 

Downstream Products

• 102725-30-4 C₃₃H₂₇OS₂Si 
• 107019-51-2 C₄₀H₄₁Si 
• 87066-11-3 C₂₆H₂₃O₄Si 
• 102725-21-3 C₂₆H₂₃O₄Si 
• 107019-66-9 C₃₃H₂₅OSi 
• 73818-08-3 C₂₆H₂₃O₂Si 
• 72975-18-9 4-triphenylsiloxy-2,6-di-t-butylphenoxyl 
• 102725-25-7 C₂₆H₂₁O₂S₂Si 
• 102725-22-4 C₂₆H₂₁O₂S₂Si 

Relevant articles and documents

Chemically induced dynamic electron polarization studies on photolysis of hexaphenyldisilane, -digermane and -distannane

EPR signals of the triphenylsilyl and triphenylgermyl radicals were observed for the first time in fluid solution by direct photolysis of hexaphenyldisilane and hexaphenyldigermane. Observed electron spin polarization was interpreted in terms of a triplet mechanism (TM). Along with the main signal, the 29Si isotope signal was also observed and the polarization was tentatively explained by combination of a TM and a radical pair mechanism. An electron density on the silicon atom of the silyl radical was determined as 0.52 from the isotropic hyperfine coupling constant of 29Si. The triphenylstannyl radical was not observed with the time resolution (ca. 80 ns) of our system.

Free radicals from cyclic enones: An electron paramagnetic resonance investigation. Part II.1 Radical additions

The addition of silyl and germyl radicals to a series of substituted cyclopentenones and cyclohexenones has been investigated using EPR spectroscopy. At low temperatures the 3-position is the preferred site for addition unless it is substituted or sterically hindered in which case addition occurs at the carbonyl oxygen. The latter process is also favoured at higher temperatures but no evidence has been obtained for either addition at the 2-position or for an intramolecular migration following initial attack at the 3- or 2-position.

Fluorescence of Silyl and Germyl Ketones and Their Primary Photochemical Processes

Dual fluorescence was observed for several mono- and bis-silyl and -germyl ketones in solution at room temperature.From their fluorescence spectra, excitation spectra, quantum yields, and time profiles, the observed fluorescence was assigned to the S2 (the second lowest excited singlet state) --> S0 (the ground state) one and the S1 (the lowest excited singlet state) --> S0 one.For the employed mono-M ketones (PhnMe3-nMCOPh, M=Si or Ge), their S2 lifetimes in cyclohexane were shorter than 160 ps and their S1 ones lay between 0.8 and 2.5 ns.For bis(triphenylsilyl) ketone in cyclohexane, its S2 lifetime was 160 ps and its S1 one as long as 460 ns.Norrish type I cleavage of these ketones in solution was also studied with time-resolved optical absorption and ESR techniques.