3. Draw the resulting product(s) from the given reactions. Provide accurate stereochemistry and regiochemistry where applicable. In cases where multiple products are generated, specify the major and minor ones. (Each answer carries a value of 2 marks.) (a) CH₂CECH + H₂ (b) + H2 Ni Lindlar's catalyst CH-Br Zn + HCI (c) CH>MgBr (d) + H₂O heat (e) C7H16 (f) CH3 CH3CH2CH CCH₂CH3 HBr (B) -CH2CH3 H3O+ 2 HCI (h) H2C=CHCH2CH2CH2CH=CH2

What are the major and minor products of this reaction?

3) Predict the major product(s) for the following reactions with appropriate stereochemistry wherever applicable. (a) (b) + H3CO OCH 3 H₂O, H₂SO4 50°C

Complete the following reaction scheme. Give all product(s) and indicate major or minor and any relevant stereochemistry (G) H2 CH2 H2 -CH2 Pd/C CH H2C (k) OH ....OH OsO, NMO OH (1) BI2

5) Please provide a synthesis of the following molecule from the given starting material. (1¸ Show the reagents and product after each step (you do not need to show mechanisms). You may ignore stereochemistry for this question. ⚫ Complete the synthesis in four steps or less.

3. For each of the following reactions, fill in the missing products, reactants, or reagents as appropriate. Account for stereochemistry when appropriate. CI Br KCN CH3OH Ph CH3OH (а) (b) CH3 CH3 KO'Bu 'BUOH Br

4.

11.; (a) Similar to alkanes, hydrogen gas can undergo radical bromination according to the reaction below. Propose a chain-reaction mechanism for this reaction, including an initiation step, propagation steps, and two plausible termination steps. The homolytic bond dissociation energy for Br-Br is 46 kcal·mole', for H-Br is 88 kcal'mole and for H-H is 104 kcal'mole'. hv H-H + Br-Br 2 H-Br (b) Calculate the overall AH for the above propagation steps (show all work).

Draw the major organic product(s) for the following. - You may assume each reaction occurs just one time. - Show or depict any relevant stereochemistry in the products [R/S or E/Z labels are not needed].

For the following reaction, indicate the major product. Be sure to indicate stereochemistry when relevant