Question

Question: Use curved arrows and draw the product of each electrocyclic reaction.

Short answer

Answer

a.

b.

c.

Step-by-step solution

Electrocyclic reactions

The reactions that involve either a ring closure or a ring-opening of a conjugated system are referred to as electrocyclic reactions.

Electrocyclic reaction of a

The given reaction involves electrocyclic ring closure.

Electrocyclic reaction of a

Electrocyclic reaction of b

The given reaction involves an electrocyclic ring-opening.

Electrocyclic reaction of b

Electrocyclic reaction of c

The rotation around the single bond generates a cis-diene.

Electrocyclic reaction of c