amines

• Amines react with water to form an alkaline solution. The lone pair of electrons on the amine's nitrogen atom can accept a hydrogen from a water molecule, therefore acting as a base, releasing OH- ions into the solution.
• Amines react with acids to form an ammonium salt. Again, the amine acts as a base and accepts a proton to form a quaternary ammonium salt.
• Aliphatic amines can be produced from the nucleophilic substitution reaction between a haloalkane and ammonia in a sealed tube
• Aliphatic amines can also be produced by the reduction of nitriles by hydrogenation. This reduction requires a combination of hydrogen with a nickel catalyst (catalytic hydrogenation).
• Aromatic amines can be produced from the reduction of nitrobenzene using concentrated hydrochloric acid (HCI) and a tin catalyst. Aromatic amines consist of an amine group and a benzene ring.