Predict the number of stereoisomers for `2,5` heptadiene.

Options

A. 4
B. 3
C. 2
D. 5

Answer

B

Explanation

Terminal groups are same. The number of double bonds is two (even numbers).
` :.` Number of `G.I= 2^(n-1)+2^((n-2)//2)= 2^(1)+2^(0)= 2+1=3`
where `n` is the number of double bonds.