Predict the major organic product of the following reaction.

a. What is the major product obtained from the reaction of propene and Br₂ plus excess Cl^-?

b. Indicate the relative amounts of the stereoisomers that are obtained.

When Br₂ adds to a cis alkene that has different substituents attached to each of the two sp² carbons, such as cis-2-heptene, identical amounts of the two threo enantiomers are obtained even though Br^- is more likely to add to the less sterically hindered carbon of the bromonium ion. Explain why identical amounts of the two enantiomers are obtained.

Propose a mechanism for the following reactions:

b.

Predict the product of the following reactions.

(d)

What is the major product of each of the following reactions?

h.

Which stereoisomer of 3-hexene forms a meso compound when it reacts with Br₂?

Draw the products of the following reactions. If the products can exist as stereoisomers, show which stereoisomers are formed.

c.

Predict the major products of the following reactions, and give the structures of any intermediates. Include stereochemistry where appropriate.

(b)