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Question: Which of the following are used as chemical resolution for racemic acid...

Which of the following are used as chemical resolution for racemic acid

A

C6H5−CH2−NH2C_6H_5-CH_2-NH_2

B

C6H5−CH2−(NH2)2C_6H_5-CH_2-(NH_2)_2

C

(C6H1)2−CH2−NH2(C_6H_1)_2-CH_2-NH_2

D

C6H5−CH−NH2C_6H_5-CH-NH_2 CH3\qquad \qquad \quad CH_3

Answer

(iv)

Explanation

Solution

Chemical resolution of a racemic acid requires a chiral base.

  1. Benzylamine (C6H5−CH2−NH2C_6H_5-CH_2-NH_2) is basic but achiral due to the -CH2- group.
  2. C6H5−CH2−(NH2)2C_6H_5-CH_2-(NH_2)_2 is ambiguously written; strict interpretation leads to an achiral compound (C6H5−C(NH2)2−HC_6H_5-C(NH_2)_2-H).
  3. (C6H1)2−CH2−NH2(C_6H_1)_2-CH_2-NH_2 is chemically incorrect and likely a typo; common interpretations of similar structures are achiral.
  4. 1-Phenylethylamine (C6H5−CH(CH3)−NH2C_6H_5-CH(CH_3)-NH_2) is basic and contains a chiral carbon atom (bonded to -C6H5, -CH3, -H, and -NH2), making it a suitable resolving agent.