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(a) Define the following terms:

       (i)  Enantiomers

        (ii) Racemic mixture

(b) Why is chlorobenzene resistant to nucleophilic substitution reaction?

 

 

 

 
 
 
 
 

Answers (1)

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(a) (i) Enantiomers are the steroisomers that forms non - superimposable mirror images.

eg.

(ii) Racemic mixture is a mixture of equal amount of left and right handed enantiomer of a chiral carbon.

(b) In chlorobenzene, the lone pair of electrons of chlorine is delocallised over the benzene to form resonating structures.

Hence, a double bond character is developed between C and Cl making it difficult to breal C - Cl bond hence nucleohillic substitution becomes difficult.

 

 

Posted by

Sumit Saini

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