Question

$3-\mathrm{Methyl}-\mathrm{pent}-2-\mathrm{ene}$ on reaction with $\mathrm{HBr}$ in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is :

• A. Two
• B. Four
• C. Six
• D. Zero

Answer 1

The correct option is B

Four

The structure of 3-Methylpent-2-ene is:

The reaction can be represented as:

The number of stereocenters of the product:

Number of stereocenters in the product, $n=2$

Thus, the number of stereoisomers$=2^n=2^2=4$

Hence, the number of possible stereoisomers for the product is $4$.

So, the correct option is (B).