Question

Imagine that a chemist has cyclohexanone, triphenylphosphine, butyllithium, and 2-bromobutane. Draw the organic product resulting from using these chemicals in the Wittig reaction.

Answer 1

Answer:

The product produced is DVB-crosslinked polystyryldiphenylphosphin

the picture is attached

Explanation:

Wittig reaction: The Wittig reaction involves the generation of an ylide intermediate.

The two components of this reaction are:

a carbonyl compound (aldehydes and

ketones both work, but not esters or

amides)

a rather strange-looking species known

as an ylide. (specifically, a "phosphonium

ylide", because there are also ylides of

nitrogen and sulfur)

The technical definition of an ylide is a

species with opposite formal charges on

adjacent atoms. Although we drew the

ylide, in the picture attached, with a double bond between

C and P, it also has an important resonance

form with a positive charge on

phosphorus and a negative charge on.

Answer 2

Answer:

Reaction product shown in the image attached.

Explanation:

The Wittig reaction also known as Wittig olefination is a reaction in organic chemistry

Involving an aldehyde or ketone (CO or CHO groups) with a triphenyl phosphonium ylide (also called a Wittig reagent ) to give an alkene and triphenylphosphine oxide .

Hence the organic reaction between a carbonyl and a phosphonium ylide is known as a Wittig reaction. The phosphonium ylide used in this reaction is obtained by reaction of 2-bromobutane and phosphine oxide followed by butyl lithium.

The carbonyl now reacts with the phosphonium ylide produced in the first step to yield the final product.

The sequence of the reaction is shown in the image attached.