Physical Properties and Intermolecular Interactions of Amines

PROBLEM 11.5 Explain why the tertiary amine (CH3)3N boils so much lower than its primary isomer CH3CH2CH2NH2. 

All three classes of amines can form hydrogen bonds with the —OH group of water (that is, O—H- -N). Primary and secondary amines can also form hydrogen bonds with the oxygen atom in water N—H- -O. Thus, most simple amines with up to five or six carbon atoms are either completely or appreciably soluble in water. 

Now we will describe some ways in which amines can be prepared. 

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