Which of the following on reaction with excess of NaHSO3 in aqueous solution will give mixture of salts which can be separated into two fractions by fractional crystallization?

Question

Which of the following on reaction with excess of NaHSO3 in aqueous solution will give mixture of salts which can be separated into two fractions by fractional crystallization? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/6dfbbbda0637f523937e55f7816f970f-.png" /> In the above reaction, four stereoisomers, two pairs of enantiomers are formed. Each member of a pair of enantiomer is diastereomer of each member of other pair of enantiomer. Hence, fractional crystallisation would give two fractions, each containing racemic mixture.

Q. Which of the following on reaction with excess of NaHSO3​ in aqueous solution will give mixture of salts which can be separated into two fractions by fractional crystallization?

In the above reaction, four stereoisomers, two pairs of enantiomers are formed. Each member of a pair of enantiomer is diastereomer of each member of other pair of enantiomer. Hence, fractional crystallisation would give two fractions, each containing racemic mixture.

Q. Which of the following on reaction with excess of $N a H S O_{3}$ in aqueous solution will give mixture of salts which can be separated into two fractions by fractional crystallization?