Nitrogen Compounds 2
1. The preparation of amines is by NUCLEOPHILIC SUBSTITUTION of the halogen in
halogenoalkanes by ammonia. What is nucleophilic substitution?
2. What are the conditions for the preparation of ethylamine?
3. Why is a sealed tube used for his reaction?
4. Write an equation for the reaction in the presence of excess ammonia.
5. There are several possible side reactions and unwanted products formed in this reaction.
a) Name and draw 2.
b) Explain how these come to be present.
6. What is steric hindrance?
7. Explain why xs ethanolic ammonia cannot be used as the reactant used to make
phenylamine from nitrobenzene.
8.How can the halogen lone pair electrons become delocalised into a benzene ring?
9. What does this do to the strength of he C-Hal bond and the chance of nucleophilic attack on
the δ+ C atom on the ring?
10. Why is the reaction of nitrobenzene with tin and concentrated hydrochloric acid described as
reduction?