Question

When sec-butylcyclohexane reacts with bromine in the presence of sunlight, the major product is:

• A.
• B.
• C.
• D.

Hint:

In free radical substitution reactions, the most stable free radical intermediate determines the major product. In this case, the benzylic position is the most stable and thus the bromine will attach there.

Answer 1

The Correct Option is B

Step 1: Free radical substitution occurs when sec-butylcyclohexane reacts with bromine under sunlight.

Step 2: Bromine substitutes a hydrogen atom at the benzylic position of sec-butylcyclohexane. This hydrogen is most reactive due to the stability of the resulting free radical.

Step 3: Consequently, the primary product features a bromine atom bonded to the carbon adjacent to the cyclohexane ring (the sec-butyl position).