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Why is alcohols used in preparation of first degree amines

Why is alcohols used in preparation of first degree amines
 

Grade:12

2 Answers

Arun
25750 Points
5 years ago

Making a primary amine

The reaction happens in two stages. In the first stage, a salt is formed - in this case, ethylammonium bromide. This is just like ammonium bromide, except that one of the hydrogens in the ammonium ion is replaced by an ethyl group.

 

There is then the possibility of a reversible reaction between this salt and excess ammonia in the mixture.

The ammonia removes a hydrogen ion from the ethylammonium ion to leave a primary amine - ethylamine.

The more ammonia there is in the mixture, the more the forward reaction is favoured.

V Prakash
29 Points
5 years ago
Best method for alcohols to amines is by reaction with HNO2.  Here a carbocation is formed. So if a tertiary alcohol is present it is better but yields will be present for other alcohols too but reaction will be slow.

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