Compound (A) with molecularformula C₃H₇NO, reacts with bromine in the presence of NaOHto give (B).Compound (B) reacts with HNO₂ To give ethylalcohol on warming with H₂O and nitrogen.Identify (A)and(B).and write reactions...

Dear Mani,

C2H5NH2 + HNO2 -> C2H5OH + H2O + N2 (Ethyl amine)

The Hofmann degradation is a reaction between an amide and a mixture of bromine and sodium hydroxide solution. Heat is needed.

The net effect of the reaction is a loss of the -CO- part of the amide group. You get a primary amine with one less carbon atom than the original amide had.

The general case would be (as a flow scheme):

If you started with ethanamide, you would get methylamine. The full equation for the reaction is:

The Hofmann degradation is used as a way of cutting a single carbon atom out of a chain.

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