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Plot of initial rates versus mole fraction of ArLi (XArLi) for the serial injection of 0.010 M aliquots of ArH to 0.10 M LDA in 12.2 M THF monitored with IR spectroscopy at −78 °C. The dotted curve depicts the theoretical initial rates in the absence of autocatalysis. The solid curve depicts an unweighted least-squares fit to eq 12. [k = (1.67 ± 0.09) × 10–5, k′ = (1.93 ± 0.05) × 10–6, n = 0.75 ± 0.3, m = 1.87 ± 0.05].
