Write chemical equation for the preparation of aniline by Hoffman Bromamide reaction and also write chemical equations of the reactions taking place between aniline with acetyl chloride and aniline with carbon disulphide.

The Hofmann degradation reaction is used to convert primary amide to a primary amine. The general Hofmann’s Bromo amide reaction may be written as, RCONH 2 + Br 2 + KOH → RNH 2 . C 6 H 5 - CO - NH 2 + Br 2 + KOH → C 6 H 5 - NH 2 . So, the Hofmann degradation of m- Bromo benzamide can give aniline. Acetyl chloride reacts with aniline in presence of pyridine to form acetanilide. During the reaction hydrochloric acid is lost which reacts with pyridine to form hydrochloride salt of pyridine. C 6 H 5 - NH 2 + CH 3 - CO - Cl → Base C 6 H 5 - NH - CO - CH 3 . Aniline reacts with carbon disulphide and bromine as follows, .

Complete the following chemical reaction and write the names of A and B. C 2 H 5 NH 2 → HNO 2 A → B CH 3 COOC 2 H 5 .

The ethylamine reacts with nitrous acid to form ethyl alcohol (A) with the liberation of nitrogen gas. This ethanol reacts with acetic acid in presence of an acid produces ethyl acetate. This reaction is known as esterification reaction. C 2 H 5 NH 2 → HNO 2 C 2 H 5 OH → CH 3 COOH CH 3 COOC 2 H 5 .

Complete the reaction: RX → KCN A → H B .

Both potassium and sodium cyanide react with alkyl halides to give excellent yields of the nitrile (A) in the solvent DMSO. This alkyl nitrile on further reduction produces alkylamine (B). Complete reaction will be: RX → KCN RCN A + KX → H RCH 2 - NH 2 B .

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter -1 - Amines>Uttar Pradesh Board-2020>Q 6

EASY

12th Uttar Pradesh Board

IMPORTANT

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Write the chemical equation for the preparation of methylamine by Schmidt reaction. Write chemical equations for the reactions taking place on heating methylamine.

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