Topic 18B - Nitrogen Compunds

Question 1

What is the product of amine + water

Answer 1

Ammonium ion + OH-

Question 2

What is the product of amine + acid

Answer 2

Ammonium salt

Question 3

What is the product of amine + acyl chloride

Answer 3

N- substituted amide and HCl

Question 4

What is the product of amine + halogenoalkane

Answer 4

Secondary amine + HX

Question 5

What is the product of amine + copper sulfate

Answer 5

Ligand and water

Question 6

Explain which is most and least basic:

Phenylamine, ammonia, primary amine

Answer 6

• primary amines are the most basic
• the alkyl groups donate electron density to the NH₂.
• the lone pair on the N becomes more readily available to attack H+.
• Phenyl amines and the least basic.
• the lone pair on the N donates electron density to the benzene ring
• the lone pair is less available to attack H+

Question 7

How can primary amines be prepared from halogenoalkanes?

Answer 7

Halogenoalkane + conc. excess ammonia = amine + ammonium salt
(ethanol)