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Solution


Q.

3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for ‘A’ is ______.           [2024]

Ans.

(4)

Major product (A) has two chiral centres and from mechanism of this reaction it is clear that both R and S configurations are possible at both these chiral centres. Hence A has 22=4 stereoisomers.