Question

Draw the products of the following Wittig reactions

a.

b.

Short answer

a.

b.

Step-by-step solution

Wittig reaction 

The treatment of a carbonyl compound with triphenylphosphonium ylide forms an alkene. Tiphenylphosphonium ylide is known as the Wittig reagent.

Product formation

a.

The reaction of propan-2-one with Ph₃P=CH₂ is shown below:

Product formation in a

b.

The reaction of cyclopentanone with Ph₃P=CHCH₂ CH₂ CH₂ CH₃is shown below:

Product formation in b