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Plots of the reaction enthalpies (a) and activation enthalpies (b) against the calculated aromatic stabilization enthalpies. Syn: red, (a) ΔH = 1.2ΔHASE – 33, r2 = 0.95; (b) ΔH⧧ = 1.1ΔHASE + 16, r2 = 0.90. Anti: blue, (a) ΔH = 1.5ΔHASE – 34, r2 = 0.95; (b) ΔH⧧ = 0.33ΔHASE + 17, r2 = 0.98.
