Final answer:
Aliphatic amines are typically prepared from haloalkanes and alcohols. Haloalkanes react with ammonia in nucleophilic substitution to produce amines, while alcohols are converted via intermediates.
Step-by-step explanation:
Aliphatic amines are usually prepared from two types of organic compounds: haloalkanes (or alkyl halides) and alcohols. Haloalkanes undergo nucleophilic substitution reactions with ammonia or amines to form aliphatic amines. Alcohols can be converted into amines through a multi-step process that involves forming an intermediate haloalkane and then introducing the amine group. In the context of amines as organic bases, primary and secondary amines exhibit hydrogen bonding, which affects their physical properties, such as boiling points.