7-cholesten-3 beta-ol +br2 +ch3cooh -> brominated cholesterol 1) (3pts) Give a stepwise mechanism for the bromination step. Why does acetate ion not attack the intermediate bromonium ion to give the 5-acetoxy-6-bromo compound in the bromination of cholesterol? [hint: which is the stronger nucleophile and why? Consult your lecture text.] 2) (2 pts) If 3?-cholestanol is an impurity in Cholesterol, why doesn't it also react with Br2? What happens to it after bromination of Cholesterol takes place? (ie- why is it that bromination allows you to separate it from cholesterol?) 3) Give a stepwise mechanism for the debromination step