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Title: Characterization of Tricoordinate Boron Chemical Shift Tensors: Definitive High-Field

Despite the large known chemical shift (CS) range for boron and the large number of 11B NMR studies of glasses, no boron CS tensors have been characterized to date. We report the application of solid-state NMR techniques at moderate (9.4 T) and high (17.63 T) applied magnetic field strengths to the characterization of the boron CS tensors in trimesitylborane (BMes3) and triphenyl borate (B(OPh)3). The boron CS tensor of the former compound exhibits a remarkably large span,? 121 1 ppm, which encompasses the known range of isotropic chemical shifts for tricoordinate boron compounds. Conversely, the effect of the boron CS tensor on the 11B NMR spectra of B(OPh)3 is difficult to observe and quantify even at field strengths as high
Authors:
 [1] ;  [2] ;  [3]
  1. (10022)
  2. (9089)
  3. (EMSL FACILITY USERS)
Publication Date:
OSTI Identifier:
15004156
DOE Contract Number:
AC06-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Physical Chemistry A; Journal Volume: 105; Journal Issue: 14; Other Information: PBD: 1 Jan 2001
Research Org:
Pacific Northwest National Lab., Richland, WA (US), Environmental Molecular Sciences Lab. (US)
Sponsoring Org:
US Department of Energy (US)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BORON; CHEMICAL SHIFT; PHYSICAL CHEMISTRY ENVIRONMENTAL MOLECULAR SCIENCES LABORATORY, CORRECTIONS TO CAPITALIZATIONS IN TITLE. JW. 7/9/03