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Chapter 12: Q.74. (page 494)

Question: Draw a stepwise mechanism for the following reaction.

Short Answer

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Answer

Step by step solution

01

Oxidization

CrO3 is a strong oxidizing agent. It also acts as a catalyst in the presence of a strong acid such as sulfuric acid.

02

Proton abstraction

The electron-rich oxygen donates its electrons to the acidic hydrogen present in H2SO4 and abstracts it making a H2O+.

03

Stepwise mechanism

The oxygen atom first donates its electrons to the acidic hydrogen present in H2SO4. The double bond undergoes rearrangement as the H2O+ ion leaves. A ketonic center is formed by the action of HSO4-.

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