CHEM 2302 Study Guide - Final Guide: Cyclopentadiene, Allyl Group, Ion
Document Summary
1: (10 pts) for each reaction shown below, circle all possible products (including minor ones). Keep in mind that, for each reaction, you might circle one, multiple, or no products. Our starting material is a conjugated diene, and dienes can react with hbr via either. In the mechanism for the addition, the diene picks up a proton first, and always puts it at the end (at the 1 position) so as to make a conjugated allyl cation intermediate: If one of the two products predominates, circle that preferred product. If the two products are produced equally, circle both . If neither product would result from the reaction, circle. So, out of the four possible addition products in this reaction (two 1,2-products and two 1,4-products), two of them appear in the answer boxes. The -(c=o)r group in the starting material is a meta-director.
