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Plot of initial rate versus [LiCl] for the ortholithiation of ArD (0.0020 M) by 0.10 M LDA in 12.2 M THF monitored with IR spectroscopy at −78 °C. The curve depicts an unweighted least-squares fit to eq 30.33 [ArD] = 0.0020 M, [A2S2] = 0.050 M, c = 2.63 × 10–6. [k1 = (5 ± 1) × 102, k–1 = (6 ± 2) × 107, k2 = 4.06, n = 2.0].
