Question

In each reaction box, place the best reagent and conditions from the list below.

Answer 1

Concepts and reason

The reagents used in an organic reaction are responsible for the products formed. By correct choice of reagents, the desired product can be formed.

Fundamentals

Depending upon the reagents used alkenes can show electrophilic addition reactions, Free radical addition reactions, oxidation reactions and free radical allylic substitution reactions.

The final product includes the addition of an ethylene group to the initial reactant.

In order to carry out this transformation, it is essential to convert the alkene into an alkane on which addition can be carried out as :

Now in order to remove the dihalogens it is essential to reduce the species such that a reactive species is formed in which substitution is possible.

To introduce an ethane group,

Since the final product consists on a cis alkene, we use Lindlars catalyst to carry out reductions.

Therefore, the entire conversion is as:

Ans:

The required reagents are: