CONCEPTUAL CHECKPOINT 21.10 Predict the major product for each of the following reaction sequences: OH 1) Br2, PBr3 2) H₂O ? a. gou OH 1) Br₂, PBr3 2) H₂O ? b. 21.11 Identify reagents that can be used to accomplish each of the following transformations (you will also need to use reactions from previous chapters). a. b. CN Br OH COOH Br Br СОН OH Br

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