In the reduction of alkynes using sodium in liquid ammonia,which of the species below is not an intermediate in the commonly accepted mechanism?
A)vinyl anion
B)vinyl radical
C)radical anion
D)vinyl cation

Question

Quizplus · Accepted Answer

The commonly accepted mechanism for the reduction of alkynes using sodium in liquid ammonia involves the formation of a radical anion intermediate, followed by the loss of a hydrogen atom to form a vinyl anion, which is then protonated to form a vinyl radical. The vinyl radical can then undergo further reduction to form a new radical anion intermediate, which can repeat the cycle. A vinyl cation is not involved in this mechanism, and is therefore not an intermediate in the reaction.

In the Reduction of Alkynes Using Sodium in Liquid Ammonia,which