Figure 3.
Plot of kobsd vs THF concentration for the metalation of 2 (0.0025 M) at –78 °C measured with IR spectroscopy (1356 cm–1). The curve depicts an unweighted least-squares fit to eq 7 that accounts for the shifting dimer–monomer mixtures described by eq 4. A simple fit to y = axn affords a = 0.018 ± 0.002, n = 1.50 ± 0.04.