Question

The number of mesostructure in the following compound is:
$HOOC\cdot CH\left(C{H}_3\right)\cdot CH\left(OH\right)\cdot CH\left(Cl\right)\cdot CH\left(OH\right)CH\left(C{H}_3\right)\cdot COOH$

• A. $3$
• B. $4$
• C. $8$
• D. $16$

Answer 1

The correct option is B $4$

Number of meso structures in compound having odd number of chiral carbon atoms and symmetrical molecule $=2^{(\frac{n}{2}-\frac{1}{2})}$
Given, $n=2$
$\therefore$ Number of meso forms $=2^{5/2-1/2}=2^2=4$