Which one of the following exhibits enantiomerism?

1. $\mathrm{BrCH}_2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{Br}$
2. 
   
3. $\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2 \mathrm{Br}$
4. $\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{CBr}_2-\mathrm{CH}_3$

Solution

compound contains a chiral centre or an asymmetric carbon atom therefore, it is optically active compound and hence this compound exhibits enantiomerism.

Asked in: AP EAMCET 2011

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