283163-02-0

Basic information

• Product Name: (RS,RS)-1,2-diphenyl-1,2-disupersilyldisilan
• CAS NO: 283163-02-0
• Molecular Weight: 611.262
• Mol File: 283163-02-0.mol
• Article Data: 2

Chemical Properties

• CAS DataBase Reference: (RS,RS)-1,2-diphenyl-1,2-disupersilyldisilan(CAS DataBase Reference)
• NIST Chemistry Reference: (RS,RS)-1,2-diphenyl-1,2-disupersilyldisilan(283163-02-0)
• EPA Substance Registry System: (RS,RS)-1,2-diphenyl-1,2-disupersilyldisilan(283163-02-0)

Safety Data

• Hazardous Substances Data: 283163-02-0(Hazardous Substances Data)

Upstream product

• 283163-01-9 Chlorphenylsupersilylsilan 
• 283163-04-2 1-Chlor-1,2-diphenyl-1,2-disupersilyldisilan 
• 283163-09-7 Dichlorphenylsupersilylsilan 

Downstream Products

• 283163-03-1 Phenylsupersilylsilan 

Relevant articles and documents

Disupersilyldisilane R*X2Si-SiX2R*: Darstellung, Charakterisierung und Strukturen; sterische Effekte der Substituenten

Disupersilyldisilanes R*X2Si-SiX2R* (R* = supersilyl = Sit-Bu3; two diastereomers in case of R*XX′Si-SiX′XR*) are prepared in organic solvent (i) by dehalogenations of supersilylhalosilanes with Na, NaC10H8 or NaR*; (ii) by reactions of disupersilylhalodisilanes with H- (Hal/H exchange); (iii) by reactions of disupersilyldisilanes with Hal2 (H/Hal exchange); (iv) by reactions of disupersilylhalodisilanes first with NaR* (Hal/Na exchange) then with agents for protonation, alkylation, silylation (Na/H, Na/Me, Na/SiMe3 exchange); or (v) by reactions of disupersilyldisilenes (here R*PhSi=SiPhR*) with HHal or Hal2 (formation of addition products). As discussed, (29Si) of the SiX2 groups of R*X2Si-SiX2R* depends strongly on the nature of X. The disupersilyldisilanes are in part moisture sensitive (compounds with SiX2 = SiHHal), in part sensitive against oxygen (compounds with SiX2 = SiHal2, SiHHal; Hal = Br, I). X-ray structure analyses of the disupersilyldisilanes R*X2Si-SiX2R* (X2 = H2, Cl2, Br2, BrH, IH, MeBr, PhH, PhCl) as well as R*PhClSi-SiHPhR* and R*PhBrSi-SiClPhR* show a staggered conformation. Due to steric repulsions of groups R*/X/X, the SiSi bond lengths are longer than 2.34 ? (normal SiSi single bond; exception: R*H2Si-SiH2R*). From the extent of SiSi bond elongation it is concluded that the bulkiness of X increases in direction H 2Si-SiH2R* leads exclusively to gauche-R*HalHSi-SiHHalR*, but chlorination gives in addition R*Cl2Si-SiH2R*. Hydridation occurs faster with trans-R*PhClSi-SiHPhR* than with the gauche-diastereomer. The R*/R* groups of the disupersilyldisilanes occupy exactly trans positions in R*X2Si-SiX2R*, trans-R*XX′Si-SiX′XR* and trans-R*PhClSi-SiHPhR*, whereas they occupy nearly trans positions in gauche-R*XX′Si-SiXX′R* (exception gauche-R*MeBrSi-SiBrMeR* with R* exactly trans).