Nitriles (Cyanides) are chemically reduced to amines using powerful reducing agents like Lithium Aluminium Hydride ($LiAl{H}_4$) or through catalytic hydrogenation (using $H_2/Ni$).

• Reaction: $R-C\equiv N+4[H]\stackrel{LiAl{H}_4}{\to }R-C{H}_2-N{H}_2$
• The triple bond is reduced to a single bond, with two hydrogen atoms adding to each of the carbon and nitrogen atoms.
• This reaction is unique because it increases the carbon chain length by one unit relative to the starting alkyl halide used to make the nitrile.