122131-73-1

Basic information

• Product Name: Disilane, 1,2-bis(1,1-dimethylethyl)-1,1,2,2-tetraphenyl-
• CAS NO: 122131-73-1
• Molecular Formula: C32H38Si2
• Molecular Weight: 478.825
• Mol File: 122131-73-1.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: Disilane, 1,2-bis(1,1-dimethylethyl)-1,1,2,2-tetraphenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Disilane, 1,2-bis(1,1-dimethylethyl)-1,1,2,2-tetraphenyl-(122131-73-1)
• EPA Substance Registry System: Disilane, 1,2-bis(1,1-dimethylethyl)-1,1,2,2-tetraphenyl-(122131-73-1)

Safety Data

• Hazardous Substances Data: 122131-73-1(Hazardous Substances Data)

Upstream product

• 63262-93-1 1,2-di-tert-butyl-1,1,2,2-tetramethyldisilane 
• 58479-61-1 tert-butylchlorodiphenylsilane 
• 76358-44-6 tBuPh₂SiSePh 

Downstream Products

• 155166-17-9 1,1,2-Tri-tert-butyl-2,2-diphenyldisilan 
• 155166-11-3 1,2-di-tert-butyl-1,2-diphenyldisilane-1,2-bis(triflate) 

Relevant articles and documents

Generation and Mesolysis of PhSeSiR3.-: Mechanistic Studies by Laser Flash Photolysis and Application for Bimolecular Group Transfer Radical Reactions

The investigation presented in this paper explores the mechanistic aspects and synthetic potentials of PET promoted reductive activation of selenosilane 1a to its radical anion 1a.-. PET activation of 1a is achieved through a photosystem comprising a light-absorbing electron-rich aromatic (ERA), such as DMN or DMA, as an electron donor and ascorbic acid as a co-oxidant. The evidence for the ET from excited singlet states of DMN as well as DMA to 1a is suggested by estimating negative ΔGet (-51 and -43.46 kcal mol-1, respectively) values and nearly diffusion- controlled fluorescence quenching rate constants (kqTR) 0.36 × 1010 M-1 s-1 and 0.28 × 1010 M-1 s-1, respectively, from time-resolved fluorescence quenching study. The transient absorption spectra of DMN.+, DMA.+, and 1a.- are obtained initially by pulse radiolysis in order to correlate the time- resolved absorption spectral data. Laser flash photolysis studies in the nanosecond time domain have confirmed the generation of 1a.-, DMN.+, and DMA.+, supporting the participation of the triplet state of DMN or DMA in the ET reaction. Mesolytic cleavage of 1a.- produced a silyl radical and a phenyl selenide anion. The preparative PET activation of 1a in acetonitrile in the presence of DMN or DMA leads to the formation of 5 and 6, confirming the fragmentation pattern of la.-. The overall ET rate constants (kr(DMN) = 0.99 × 1010 M-1 s-1 and kr(DMA) = 1.62 × 1010 M-1 s-1) and limiting quantum yields (φlim(DMN) = 0.034 and φlim(DMA) = 0.12) are estimated from the inverse plot (1/[1a] vs 1/φdis) obtained by measuring the dependence of photodissociation quantum yields of 1a at its maximum concentration in the presence of DMN or DMA. Silicon-centered radical species generated from the mesolysis of 1a.- are utilized for initiating a radical reaction by the abstraction of halogen atom from -C-X (X = Cl, Br) bonds, while PhSe-1 terminates the radical sequences via PhSeSePh. This concept is successfully applied for the bimolecular group transfer (BMGT) radical reactions and intermolecular radical chain addition reactions.

Efficient formation and cleavage of disilanes by potassium-graphite. Silylation with silyl metal reagents

Potassium-graphite laminate (C8K) very rapidly forms disilanes from chlorosilanes and then rapidly cleaves the disilanes to give silyl potassium reagents which can be converted into potassium silyl cuprates, -manganates, and -vanadates that are useful for various nucleophilic substitution and addition reactions.