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- Describe the E/Z stereochemistry for the molecules shown below: A: Z; B: Z A: Z; B: E A: E; B: E A: E; B: Z[VII4,5] Instructions: Answer the following: (Refer to the photo below) 4. What is the structure of compound C? 5. What is the structure of compound A?What substrates are needed to synthesize the conjugate addition product below? a) 1 and 3 b) 2 and 3 c) 1 and 4 d) 2 and 4
- Predict the product of treating the given alkene with the reagent shown below. Only draw one enantiomer if more than one is possible. Include H's on chirality centersThuggacin C is a natural product with excellent biological activity. How many chirality centers does Thuggacin C have? a. 6 b. 7 c. 8 d. 99. Which of the following alkenes has a Z configuration?
- Predict the product C of the following reaction below and briefly explain youranswer.[PtCl3(C2H4)]¯ + NH3 → CPredict the major products of the following reactions, including stereochemistry.(a) cyclohexene + KMnO4>H2O (cold, dilute)(b) cyclohexene + peroxyacetic acid in watera) Draw both chair conformations of the starting alkyl bromide. Indicate which conformation, if either is more stable. Briefly justify your answer. b) The starting alkyl halide has two chiral carbons. What are the configurations (R/S) at each of these carbons? c) Identify the mechanism (E1/E2) which reactions 1, 2, and 3 proceed by. d) Provide mechanisms that explain the products formed in reactions 1, 2, and 3. All electron movement must be shown in order to receive full credit. e) Indicate which product is the major and which product is the minor in reactions 2 and 3. Briefly justify your answer.
- Q2. What are the products of the following reactions? Q3. 2-Bromopentane, when treated with alcoholic KOH yields a mixture of three alkenes A, B and C. Identify A, B and C. Which is predominant? The barrier to rotation about the C-C bond in bromoethane is 15 kJ/mol (3.6 kcal/mol). (a) What energy value can you assign to a H-Br eclipsing interaction? (b) Construct a quantitative diagram of potential energy versus amount of bond rotation for bromoethane.Consider diastereomers X and Y shown below. Cl diastereomer X Cl HO H OH H Each diastereomer, if treated with sodium ethoxide (NaOCH2CH3), undergoes an E2 reaction. One of the diastereomers undergoes an E2 to make a single compound. The other diastereomers undergoes E2 eliminations leading to two different compounds. Draw the mechanisms for all three of these E2 reactions, being sure to use conformational structures for the substrate in each reaction. Which of the two diastereomers will undergo an E2 reaction at the faster rate? Why? (In organic chemistry it is often said one picture is worth a thousand words. Be sure to include a picture that supports whatever argument you are making.