Question Detail
Question
Dehydrohalogenation of 2-bromobutane in the presence of a strong base proceeds via which of the following mechanistic pathways?
Correct Answer
Option D is the correct answer.
Detailed Explanation
Dehydrohalogenation (elimination) of a secondary alkyl halide like 2-bromobutane with a strong base proceeds via an E2 mechanism (bimolecular elimination). The base abstracts a beta-hydrogen in a concerted step with loss of the leaving group.
Hint
What mechanism is favored for elimination with a strong base?