4.7 Article

Perturbation of 1JC,F Coupling in Carbon-Fluorine Bonds on Coordination to Lewis Acids: A Structural, Spectroscopic, and Computational Study

Journal

INORGANIC CHEMISTRY
Volume 59, Issue 23, Pages 17259-17267

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.0c02516

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Funding

  1. Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences Heavy Element Chemistry Program of the U.S. Department of Energy (DOE) at LBNL [DE-AC02-05CH11231]
  2. Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy [DE-AC02-05CH11231]
  3. Goldwater Foundation
  4. National Science Foundation Graduate Research Fellowship Program [DGE 1106400]
  5. U.S. DOE Integrated University Program
  6. NIH [S10OD024998]

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A lithiated m-terphenyl ligand bearing fluorine atoms at the ortho positions of the flanking aryl rings was synthesized and characterized using single crystal X-ray diffraction, variable-temperature multinuclear NMR spectroscopy, and computational methods. Changes in (1)J(C,F) on coordination to lithium as a spectroscopic observable parametrizing the strength of the C-F center dot center dot center dot Li interaction are described, and a general, qualitative relationship between C-F bond lengths, Delta(1)J(C,F) values, and the extent of C-F bond activation as a result of Lewis acid coordination is proposed.

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