9. Alkenes and Alkynes

Two elimination products are obtained from the following E2 reaction:

a. What are the elimination products?

b. Which is formed in greater yield?

What is the major elimination product obtained from an E2 reaction of each of the following alkyl halides with hydroxide ion?

a.

What is the major elimination product obtained from an E2 reaction of each of the following alkyl halides with hydroxide ion?

b.

What products will be obtained from the E2 reaction of the following alkyl halides?

b.

Draw the major product obtained when each of the following alkyl halides undergoes an E2 reaction:

a.

Draw the major product obtained when each of the following alkyl halides undergoes an E2 reaction:

b.

Draw the major product obtained when each of the following alkyl halides undergoes an E2 reaction:

f.

Predict the major product(s) of the following elimination reactions, paying close attention to the stereochemical outcome of the reactions.

(b) 

a. What is the major product obtained when each of the following compounds undergoes an E2 reaction with methoxide ion? Show the configuration of the product.

b. Does the product obtained depend on whether you start with the R or S enantiomer of the reactant?

3.

Which alkyl halide in each pair is more reactive in an E2 reaction with hydroxide ion?

a.

b.

Which alkyl halide in each pair is more reactive in an E2 reaction with hydroxide ion?

a.

b.

Which alkyl halide in each pair is more reactive in an E2 reaction with hydroxide ion?

c.

d.

For each of the following alkyl halides, indicate the stereoisomer that would be obtained in greatest yield in an E2 reaction.

c. 3-bromo-2,3-dimethylpentane

d. 3-bromo-3,4-dimethylhexane

For each of the following alkyl halides, indicate the stereoisomer that would be obtained in greatest yield in an E2 reaction.

d. 3-bromo-3,4-dimethylhexane

What is the major product formed when the following compounds undergo an E1 reaction?

a.