1.27: Quiz 5B

1. Clearly indicate true (T) or false (F) for the following statements (2 pts each):

2. Multiple Choice: (2 pts each)
   1. Select the major product for the reaction of 1-butyne with excess HCl?

      

      

      
      
   2. Which of the following reactions forms a new C-O bond in the product?
      1. Alkene reaction with HCl
      2. Alkene reaction with CH₃OH without an acid catalyst
      3. Alkene hydration reaction with an acid catalyst
      4. Alkene hydrogenation with a palladium catalyst
         
   3. Consider the reaction coordinate diagram below and answer the questions (1 pt each):

How many transition states are present in the reaction diagram? How many intermediates are present in the reaction diagram? What species on the diagram is most stable (give a letter)? What species on the diagram is least stable (give a letter)? Is the overall reaction favorable? (Indicate yes or no) (i.e. exothermic)

3. (8 pts) Label the nucleophile (N) and electrophile (E) in each of the following reaction steps. Then draw the curved arrows to show the flow of electrons and give the structure (intermediate or product) that would result.

4. (7 pts) Draw the curved arrow mechanism and intermediates for the addition of H-Br to an alkene.

5. (8 pts) Indicate (circle) which of the carbocations in the following pair is more stable and briefly explain your answer.

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6. (4 pts) What is the best carbon building block that should be used to synthesize the following alcohol or alkyl bromide?

7. Extra Practice (4 pts): What type of polymerization reaction is used to synthesize polystyrene (Styrofoam)?

What is the carbon building block (monomer) that is used to synthesize polystyrene? (give structure in the box)

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