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Making a secondary
amine
The reaction doesn't
stop at a primary amine. The ethylamine also reacts with bromoethane
- in the
same two stages as before.
In the first stage,
you get a salt formed - this time, diethylammonium bromide.
Think of this as
ammonium bromide with two hydrogens replaced by ethyl groups.
There is again the
possibility of a reversible reaction between this salt and excess
ammonia in
the mixture.
The ammonia removes a
hydrogen ion from the diethylammonium ion to leave a
secondary amine -
diethylamine. A secondary amine is one which has two alkyl groups
attached to
the nitrogen.
This time there isn't
any hydrogen left on the nitrogen to be removed. The reaction stops
here.
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Sunday, 30 April 2017
Making a secondary amine
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