Benzene: Much more stable and much less reactive than 3 isolated double bonds H H H H +Br— Br Br— Br H H kcal H but... △H=-29.2 mol H H No 1+Br—BrX产 Reaction AH=+2 kcal H molC C C C C C H H H H H H + Br Br Benzene: • Much more stable and much less reactive than 3 isolated double bonds but... X No Reaction ΔH = −29.2 kcal mol ΔH = +2 kcal mol C C H H H H + Br Br C C H H H H Br Br VI-8