Question

Predict the stereochemistry of the product formed if an optically a
alkyl halide undergoes substitution reaction by Sn1 mechanism.​

Answer 1

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SN1 Reaction Mechanism. SN1 reaction mechanism follows a step by step process wherein first, the carbocation is formed from the removal of the leaving group. Then the carbocation is attacked by the nucleophile. Finally, the deprotonation of the protonated nucleophile takes place to give the required product.

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Answer 2

Racemisation occurs in case of SN1 reaction.

Explanation:

• SN1 is the process of substitution reaction where there is a carbocation formation and then a nucleophilic attack on that carbocation to form a product.

• The SN1 reaction intermediate is a carbocation.

• Now a carbocation is a sp2 hybrid structure which is planar.

• So the nucleophile can attack from any side of the plane.

• So the product that is formed is a mixture of both the stereoisomers.

• So the product is a racemic mixture.

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