90654-96-9

Basic information

• Product Name: Disilane, 1,1,2-trichloro-1,2-dimethyl-2-phenyl-
• CAS NO: 90654-96-9
• Molecular Formula: C8H11Cl3Si2
• Molecular Weight: 269.705
• Mol File: 90654-96-9.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: Disilane, 1,1,2-trichloro-1,2-dimethyl-2-phenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Disilane, 1,1,2-trichloro-1,2-dimethyl-2-phenyl-(90654-96-9)
• EPA Substance Registry System: Disilane, 1,1,2-trichloro-1,2-dimethyl-2-phenyl-(90654-96-9)

Safety Data

• Hazardous Substances Data: 90654-96-9(Hazardous Substances Data)

Upstream product

• 4518-98-3 1,1,2,2-tetrachloro-1,2-dimethyldisilane 
• 100-59-4 phenylmagnesium chloride 
• 108-86-1 bromobenzene 

Relevant articles and documents

Synthesis and characterization of 2,5,7-trichalcogena-1,3,4,6-tetrasilanorbornanes (RMeSiSiMe)2E3 (R=Me, Ph/E=S, Se, Te)

The reactions of the trichlorodisilanes ClRMeSi-SiMeCl2 (R=Me, Ph) with either H2S/NEt3 or Li2E (E=Se, Te) result in the selective formation of 2,5,7-trichalcogena-1,3,4,6-tetrasilanorbornanes (RMeSiSiMe)2E3 (R=Me, Ph/E=S, Se, Te). In the cases of R=Ph, three stereoisomers with different spatial orientations of the phenyl substituents arise. The isomers with both phenyl substituents in equatorial positions are formed preferably. All products have been characterized by multinuclear NMR spectroscopy including 1JSiSe and 1JSiTe coupling constants. A crystal structure analysis of the isomer of (PhMeSiSiMe)2S3 with both phenyl substituents in equatorial positions reveals a very small bond angle at the bridging sulfur atom of 88.5° which is even 4.6° smaller than in the parent norbornane C7H12.

Atrane Analogous Compounds of the Type (I)

Heterocyclic cage compounds of type I (compounds 8 - 10) have been prepared by condensation reactions of 1,2,2-trifunctional disilanes Me(R)XSiSiMeX2 (R = Me, Ph, OEt; X = NMe2, OEt) with triethanolamine using the "Dilution Principle".The starting compounds are obtained by Si - Me cleavage of Si2Me6 with acetylchloride/AlCl3 followed by either aminolysis with HNMe2 or alcoholysis with EtOH. 1H NMR spectra indicate N -> Si(1) intraction with the more acidic Si atom in 8 and 9.This result is proved by the X-ray structure analysis of 8 (monoclinic, P 21/c; a = 7.088(2), b = 15.070(4), c = 12.701(4) Angstroem, β = 104.96(2) at -130 deg C, Z = 4); the Si(1) *** N distance is found to be 2.768 Angstroem, connected with a significant angular distortion of the tetrahedral coordination around Si(1) towards a trigonal bipyramid.In compound 10, too, N -> Si(1) coordination is observed at room temperature in spite of almost equal acidity for both Si atoms.This can be explained by the preference of 5- over 6-membered chelating ring systems.At higher temperatures the 1H NMR spectra show a fluctuation of the N-donor between the two Si centres. - Key words: Silatranes, Transanular N -> Si-Interactions, NMR Spectra, X-Ray