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Haloalkanes And Haloarenes

Question
CBSEENCH12007673

What happens when an alkyl halide is treated with AgCN and the product is reduced?

Solution

When alkyl halide is treated with AgCN, it form alkyl isocyanide such as
straight R space minus straight X space plus AgCN space rightwards arrow with space space space space increment space space space space on top space RC identical to straight N space plus space AgX
Further reaction of alkyl isocyanide with LiAlH4, which act as reducing agent form secondary amines. 
  space space space straight R minus straight N identical to straight C space space rightwards arrow space space straight R space – NH long dash CH 3