Question

Question: Which compounds can be prepared in good yield by allylic halogenation of an alkene?

a.

b.

c.

Short answer

Answer

a. Heptane

b. Cannot be made

c. Cannot be made

Step-by-step solution

Halogenation

It involves the treatment of alkene with NBS in the presence of sunlight. The reaction yields the product via allylic substitution.

 Step 2: Explanation

a.

The allylic halogenation of cycloheptane forms 3-bromocyclohept-1-ene in a good yield. The reaction is shown below:

Formation of product in a

b.

The given compound can not be made via allylic halogenation method as the starting material (alkene) would produce the mixture of allylic halides.

c.

The given compound can not be made via allylic halogenation method as the starting material (alkene) would produce the mixture of allylic halides.