The synthesis, spectroscopy, and structural characterization of a series of new trialkylboranes are described. The nature of the alkyl ligands, which possess bicyclic structures, confer unusual features on the structure of the trialkylborane. Their structures are exemplified by the illustration, which shows that all three ligands are located on one side of the central BC3 plane contrary to steric expectations. In order to distinguish between crystal packing effects and dispersion effects, these complexes have been thoroughly investigated by NMR spectroscopy. Significant chemical shifts in the 11B spectra (greater than 7 ppm downfield when compared to cyclohexyl ligands) are observed and may be indicative of the presence of dispersion forces even in the liquid state. Further spectral investigations and computational analysis are underway to determine the role that dispersion forces play in stabilizing these unique geometries.

Synthesis, spectroscopic, and structural characterization of structurally unique trialkylboranes: Evidence of unusual geometries stabilized by dispersion effects

248th National Meeting (2014)

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