Through SN1, racemisation takes place.Justify.

Asked by  | 29th Dec, 2008, 04:18: PM

Expert Answer:

Through SN1 mechanism, racemisation takes place because of the formation of carbocation in the first step.

SN1 takes place through two steps.

In the first step, the leaving group ( the halide ion) leaves the carbon and a carbocation is formed. A carbocation is planar.

Thus, in the second step, the attack of the nucleophile on the carbocation can take place from both the sides - front attack and back attack.Thus, a racemic mixture is formed. 

Answered by  | 2nd Jan, 2009, 11:01: AM

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