Chapter 9.4, Problem 7CC

(a)

Interpretation Introduction

Interpretation: For the given reaction, a major product is to be drawn. The mechanism for the given reaction is also to be identified.

Concept introduction:

  ${\text{NaNH}}_{\text{2}}$ is the conjugate base of ammonia. It is more basic than NaOH. ${\text{NaNH}}_{\text{2}}$ is a useful reagent for eliminating bromides from geminal dihalides to form alkynes.

(b)

Interpretation Introduction

Interpretation: For the given reaction, a major product is to be drawn. The mechanism for the given reaction is also to be identified.

Concept introduction:

  ${\text{NaNH}}_{\text{2}}$ is the conjugate base of ammonia. It is more basic than NaOH. ${\text{NaNH}}_{\text{2}}$ is a useful reagent for eliminating bromides from vicinal dihalides to form alkynes.