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Explain the following : Hoffmann amono...

Explain the following :
Hoffmann amonolysis

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Hoffmann ammodolysis , The process of cleavage of C-X bond by .ammonia molecule is called ammonolysis. The reaction is carried out in a sealed tube at 373K. The `1^@` amine there formed behaves as a nucleophile an can further react with alkyl halide to form `2^@ and 3^@` amine, and finally quatenary ammonium salt.
When alkyl halide is less,
` overset(* *) NH_3 + R -X to R overset(+)RH_2 barX`
` R overset(+)NH_2 vbarX + NaOH ro RNH_2 + H_2O + overset(+)(NabarX)`
When alkyl halides in excess ,
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