# What will be the major product of the following dehydrohalogenation?

Question:-

My Attempt:- I believe the answer should be C, because even if 2-butyne is formed $$\ce{NaNH2}$$ should cause it to rearrange into a terminal alkyne. Hence the answer should be 1-butyne. But the book says B as the answer.

• You are correct, if the last reaction was heated in extended time. However, $\ce{NH2-}$ is not the best catalyst for zipper reaction. Besides, judging from the question, I believe zipper reaction is not intended for the students in this class. Apr 17, 2020 at 5:24