Identify A, B and C: CH3-NO2 --LiAlH4--> A --2 CH3CH2Br--> B --H2SO4--> C

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Q. Identify A, B and C: CH3-NO2 --LiAlH4--> A --2 CH3CH2Br--> B --H2SO4--> C

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Step 1. CH3-NO2 + LiAlH4 reduces the nitro group to the primary amine, giving A = methanamine, CH3-NH2.

Step 2. A + 2 CH3CH2Br means TWO equivalents of ethyl bromide react successively by N-alkylation (Section on chemical reactions of amines): the first equivalent converts the primary amine to a secondary amine, CH3-NH-C2H5 (N-ethylmethanamine); the second equivalent converts that secondary amine on to a TERTIARY amine, giving B = CH3-N(C2H5)2, N,N-diethylmethanamine. …

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Q.Identify A, B and C: CH3-NO2 --LiAlH4--> A --2 CH3CH2Br--> B --H2SO4--> C

Concept understanding — Preparation of Amines

Q.Identify A, B and C: CH3-NO2 --LiAlH4--> A --2 CH3CH2Br--> B --H2SO4--> C

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