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Chapter 18: Q3P. (page 923)

Why were no products from McLafferty rearrangement observed in the spectrum of butan-2-one?

Short Answer

Expert verified

Butan-2-one has no gamma γ hydrogen, so no products were present in the McLafferty rearrangement.

Step by step solution

01

McLaffertyRearrangement

The characteristic fragmentation of the molecular ion of a carbonyl compound (ketones and aldehydes) having at least one gamma γ hydrogen is known as the McLafferty rearrangement.

02

McLafferty Rearrangement Observed in the Spectrum of Butan-2-one

The structure of butan-2-one is shown below.

Since there is no gamma γ hydrogen in butan-2-one, so no products were observed in the McLafferty rearrangement.

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