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Vicinal dihalides undergo double dehydro...


Vicinal dihalides undergo double dehydrohalogenation to give terminal alkyne. How many moles of `NaNH_2` are used in the overall reaction?

A

One

B

Two

C

Three

D

Four

Text Solution

Verified by Experts

The correct Answer is:
C

Double dehydrohalogenation requires 2 mol of `NaNH_2`. The terminal alkyne is converted to alkynyl anion as soon as it is formed. Thus, 3 mol of `NaNH_2` of the base are used in the overall reaction.
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