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CBSE Class 12-science Answered

Through SN1, racemisation takes place.Justify.
Asked by | 29 Dec, 2008, 04:18: PM
answered-by-expert 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 | 02 Jan, 2009, 11:01: AM

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