Chapter 10.5, Problem 10CC

Interpretation Introduction

Interpretation:

The major products for the given different alkyne molecules and transformations should be identified.

Concept Introduction:

Birch reduction: The conjugated alkynes and benzenes in the presence of sodium metal in liquid ammonia and alkyne produced a non-conjugated diene system. The alkyne involves sodium $\left(\text{Na}\right){\text{/NH}}_{\text{3}}$. This end up reducing to alkyne to give the trans (E) alkene.

Metal reduction: The alkyne molecules can also be reduced to trans alkenes via an entirely different reaction called dissolving metal $\left({\text{Na/NH}}_{\text{3}}\right)$ reduction.