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'n B NMR Spectra' in keywords Facet   Publication Year 1981  [X]
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1981[X]
1Author    Werner Biffar, Heinrich NöthRequires cookie*
 Title    Beiträge zur Chemie des Bors  
 Abstract    , 124 [1] Tris(trimethylsilyl)silyl-borane und Tris(trimethylsilyl)silyl-borate Contributions to the Chemistry of Boron, 124 [1] Tris(trimethylsilyl)silyl Boranes and Tris(trimethylsilyl)silyl Borates The reactions of several boron halides, methoxides, alkyls and hydrides with tris(tri-methylsilyl)silyllithium, which was isolated as the solvate [(CH3)3Si]3SiLi • SCtHsO, 1 (TMSSLi) have been studied. (CH 3)2B-Si[Si(CH 3) 3 ]3 and 9-[(CH 3)3Si] 3 Si-9-BBN, were isolated, while [(CH 3)3Si]3Si-B(«C4H 9)2 could only be detected by n B NMR. In addition TMSS-B[N(CH 3) 2 ]2, (TMSS) 2 BNMe 2 and (TMSS) 2 BOCH 3 were prepared. The methoxy-boranes (CHs)3_ n B(OCHa) n add to 1 forming silylborates; however, no OCH3/Si[Si(CH3)3]3 substitution occurs. The hydrogen bridge in 9-BBN is cleaved symmetrically. The results can be explained by the basicity and the steric requirements of the TMSS group. The TMSS group exhibits a deshielding effect at the boron nucleus relative to the (CH3)3Si group for silylboranes as well as for silylborates. 
  Reference    Z. Naturforsch. 36b, 1509—1515 (1981); eingegangen am 3. Juli 1981 
  Published    1981 
  Keywords    Silylboranes, Silylborates, Steric effects, n B NMR Spectra 
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 TEI-XML for    default:Reihe_B/36/ZNB-1981-36b-1509.pdf 
 Identifier    ZNB-1981-36b-1509 
 Volume    36