Amines And Amides

Question 1

Explain why 3aminopentane is a stronger base than ammonia (2marks)

Answer 1

-lone pair of N more available
-because alkyl electron pushing

Question 2

Identify a substance that could be added to aqueous butyl amine to produce a basic buffer

Answer 2

Any strong acid (not concentrated )

Question 3

Explain the difference in base strength of the three amines

Answer 3

-strength depends on line pair of N
-N next to ring delocalised into ring
-lp less available
-others N next to alkyl- elctronf pushed to N
-lp more available
-

Question 4

Suggest how the reaction conditions could be modified to minimise this contamination

Answer 4

• subsituiation
  -use of an excess of NH3

Question 5

Suggest one reason why phenylamine cannot be prepared from bromibenzene

Answer 5

-repels Nucleophile NH3
-20-60 degrees