Saturday, 29 April 2017

The reactions of amines with acyl chlorides (acid chlorides)



The reactions of amines with acyl chlorides (acid chlorides)
We'll take the reaction between methylamine and ethanoyl chloride as typical.
If you add concentrated methylamine solution to ethanoyl chloride, there is a violent 
 reaction in the cold. N-methylethanamide and methylammonium chloride are formed - 
partly as a white solid mixture, and partly in solution.
The overall equation is:

The reactions of amines with acid anhydrides
These reactions are chemically similar to those between amines and acyl chlorides, but
 they are much slower, needing heat.
Taking the reaction between methylamine and ethanoic anhydride as typical:
The product is N-methylethanamide (as with ethanoyl chloride), but this time the other 
 product is methylammonium ethanoate rather than methylammonium chloride.

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