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. Author manuscript; available in PMC: 2018 Nov 17.
Published in final edited form as: J Am Chem Soc. 2018 Jan 5;140(2):793–806. doi: 10.1021/jacs.7b11853

Figure 1.

Figure 1

(a) Superimposed 19F NMR spectra of 4-fluorophenol, bis(4-fluorophenoxide)cuprate (1b), and potassium 4-fluorophenoxide at −100 °C in THF. (b) 19F NMR spectrum of cuprate 1b and KLX2 at room temperature. (c) 19F NMR spectrum of cuprate 1b and KLX2 at −100 °C. (d) 19F NMR spectrum of cuprate 1b and HLX2 at room temperature. (e) 19F NMR spectrum of cuprate 1b and HLX2 at −100 °C. (f) Proposed structure of K[Cu(LX2)OAr] and equilibria to generate the new species observed at −135.5 ppm. All 19F NMR spectra were obtained in THF and are referenced to fluorobenzene at −113.2 ppm.