Chapter 16, Problem 16.25P

Interpretation Introduction

Interpretation:

Two sets of reagents that might be combined in a Wittig reaction to give 1-Phenyl-1,3-pentadiene has to be suggested.

Concept introduction:

The functional group in the aldehydes and Ketones are carbonyl group.

An Alkene containing a halogen group in the allylic position is called as Allylic halides. Allylic position is the position next to $\text{C=C}$ bond.

Compounds with two double bonds are known as dienes.

Wittig reaction is a reaction in which a nucleophilic elimination occurs after nucleophilic addition reaction. In this reaction an aldehyde or ketone reacts with a triphenyl phosphonium ylide (Wittig reagent) to give an alkene and triphenylphosphine oxide.

The reaction can be represented as shown below,

Mechanism: