Problems and exercisesSEAr Mechanism

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1. The energy diagram

Fill in the energy diagram with the corresponding species, indicating whether they are reactive intermediates (RI) or transition states (TS).

2. Slow step

Why is the first step of SEAr much slower than the second?

3. Energy balance

Calculate the ΔH° of the bromination of benzene from these bond enthalpies (kcal/mol): Br–Br, 46; H–C₆H₅, 111; H–Br, 87; Br–C₆H₅, 80.

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