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'Hydridosilylamides' in keywords Facet   Publication Year 2000  [X]
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1Author    Jan Schneider, Eckhard Popowski, Normen PeuleckeRequires cookie*
 Title    Reaktionen der Lithiumhydridosilylamide Me2(H)Si-N(Li)R (R = CMe3, SiMe3) mit Chlortrimethylstannan und Chlormethylsilanen M e^ SiC l« {n = 1 -3) Reactions of Lithium Hydridosilylamides Me2(H)Si-N(Li)R (R = CMe3, SiMe3) with Chlorotrimethylstannane and Chloromethylsilanes Me4_" SiCl, in = 1 -3)  
 Abstract    The under reflux conditions in /7-octane stable lithium hydridosilylamides Me2(H)Si-N(Li)R (1: R = CM e3, 2: SiMe3) were allowed to react with chlorotrimethylstannane and chlorom e­ thylsilanes Me4_"SiCl" (n = 1 -3) in different molar ratios. 1 reacts with Me3SnCl in n-pentane to give the cyclodisilazane [Me2Si-NCMe3]2 (3) and Me3SnH. The reaction of 2 with Me3SnCl under the same conditions leads to a mixture of Me2 (H)Si-N(SnM e3)SiMe3 (5), [Me2Si-NSiM e3]2 (4), and to Me3SnH. In the reactions of 1 and 2 with chlorotrimethylstannane in tetrahydrofuran the corresponding N-stannylation products Me2(H)Si-N(SnMe3)R 5, 6 and very small amounts of (M e3Sn)2 are formed. The results of the reactions of 1 and 2 with Me2SiCl2 and of 1 with MeSiCl3 in n-hexane show that hydrogen-chlorine-exchange proceeds between the reactants. With Me2SiCl2 the cor­ responding cyclodisilazanes [Me2Si-NR]2 3, 4, N-silylation products Me2(H)Si-N(SiM e2Cl)R 7b, 8b, and Me2(H)Si-N(SiMe2H)R 7c, 8c, and the silanes Me2SiHCl and M e2SiH2 are formed, the cyclodisilazanes being the main products. 1 and M eSiCl3 produce 3, Me2(H)Si-N(R')CM e3 (7d: R' = SiMeCl2, 7e: R' = SiMeCIH, 7f: R' = SiM eH2) and MeSiH3. In comparison with the reaction of 1 with Me2SiCl2 the yield o f cyclodisilazane is smaller and that of N-silylated compounds is higher. The reaction behaviour of 1 towards M e2SiCl2 and M eSiCl3 in THF is comparable to that in n-hexane. No silanimine intermediates are observed in the reactions of 1 or 2 with the chloromethylsi­ lanes Me4_,7SiCl" (n = 1 -3) in the molar ratios 1:5 and 1:10. 
  Reference    Z. Naturforsch. 55b, 924—934 (2000); eingegangen am 25. Mai 2000 
  Published    2000 
  Keywords    Hydridosilylamides, Cyclodisilazanes, Hydrogen-Chlorine-Exchange 
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 TEI-XML for    default:Reihe_B/55/ZNB-2000-55b-0924.pdf 
 Identifier    ZNB-2000-55b-0924 
 Volume    55