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'Carbenium Ions' in keywords Facet   Publication Year 1980  [X]
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1Author    Bernd WrackmeyerRequires cookie*
 Title    Vergleich zwischen n B-und 13 C-chemischen Verschiebungen dreifach koordinierter Borverbindungen und Carbenium-Ionen Comparison between n B and 13 C Chemical Shifts of Three-Coordinate Boron Compounds and Carbenium Ions  
 Abstract    The relationship between U B chemical shifts (<5 n B) of trigonal boranes and 13 C® chemical shifts (<5 13 C®) of carbenium ions was found to be more complex than previously reported. The trends observed allow for the comparison of (pp) n bonding between boron and suitable substituents with the TT-charge derealization in carbenium ions. In case of the ferrocenyl boranes and ferrocenyl carbenium ions the markedly different trend in the shielding of 11 B and 13 C® favours a fulvene-like structure for the substituted cyclopenta-dienyl ring in the latter. Structural features are analogously reflected by <5 U B and d 13 C® data for both series of compounds. Comparison of <5 13 C data of organoboranes and carbe-nium ions can be useful in conformational studies. Einführung 
  Reference    Z. Naturforsch. 35b, 439—446 (1980); eingegangen am 5. November/14. Dezember 1979 
  Published    1980 
  Keywords    Boranes, Carbenium Ions, 13 C NMR Spectra, U B NMR Spectra 
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 TEI-XML for    default:Reihe_B/35/ZNB-1980-35b-0439.pdf 
 Identifier    ZNB-1980-35b-0439 
 Volume    35