In order to prepare a `1^(@)` amine from an alkyl halide with simultaneous addition of one `CH_(2)` group in the carbon chain, the reagent used as source of nitrogen is…..

Options

A. Sodium amide, `NaNH_(2)`
B. Sodium azide, `NaN_(3)`
C. Potassium cyanide, KCN
D. Potassium phthalimide, `C_(6)H_(5)(CO)_(2)N^(-)+K^(+)`

Answer

C

Explanation

Cyanides on reducing give `1^(@)` amines with one more `CH_(2)` group, i.e.,
`R-X underset(-KX)overset(KCN)to R-CN overset(Na//C_(2)H_(5)OH)to R-CH_(2)NH_(2)`