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11B Chemical Shifts of Three Coordinate Boron

  • Heinrich Nöth
  • Bernd Wrackmeyer
Part of the NMR Basic Principles and Progress / NMR Grundlagen und Fortschritte book series (NMR, volume 14)

Abstract

The 11 B chemical shifts (δ11 B) for tervalent boron compounds depend upon the π-donor ability of the ligands. Therefore it is possible to observe δ11 B at rather high field although a low field resonance is expected on electronegativity grounds. Thus σ- and π-bonding effects have to be considered in discussing δ11 B data. The two effects are not easily separated because there are practically no compounds BX3 where X is a strong electronegative atom or group without free electron pairs available for π-bonding.

Keywords

Ring System Boron Atom Upfield Shift Field Shift Steric Crowding 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1978

Authors and Affiliations

  • Heinrich Nöth
    • 1
  • Bernd Wrackmeyer
    • 1
  1. 1.Institut für Anorganische ChemieUniversität MünchenMünchen 2Germany

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