Which of the following reagents can be used to convert primary amides into primary amines containing the same number of carbon atoms ?

Options

A. `Br_(2)+ NaOH`
B. `LiAlH_(4)`
C. `Sn+ HCl`
D. `Na+ C_(2)H_(5)OH`

Answer

B

Explanation

Reduction with `LiAlH_(4)` converts `-CONH_(2)` to `-CH_(2)NH_(2)` (`1^(@)` amines) with same number of carbon atoms. In contrast `Br_(2) + NaOH` will bring about Hofmann bromamide reaction giving `1^(@)` amines with one carbon atom less than the parent amide, e.g. `RCONH_(2) overset(Br_(2)+NaOH)rarr RNH_(2)`