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Calculated free energy for (a) N2 elimination of phenyldiazoacetate (1) in the presence of B(C6F5)3 via path O, (b) nucleophilic attack transition structures of indole, benzofuran, indene, and styrene, on the carbon center of 3, and (c) plausible rearrangement of intermediate 3. The relative free energies are given in kcal/mol, and the angle is annotated in green.
