Arylamines such as aniline are usually colorless but develop color upon storage due to atmospheric oxidation.

Lower aliphatic amines are typically gases with a fishy odor. Primary amines with three or more carbon atoms exist as liquids, while higher ones are solid.

Hoffmann bromamide degradation involves treating an amide with bromine in an aqueous or ethanolic solution of sodium hydroxide. This reaction leads to the migration of an alkyl or aryl group from the carbonyl carbon of the amide to the nitrogen ...

Gabriel synthesis involves treating phthalimide with ethanolic potassium hydroxide, followed by heating with alkyl halide and alkaline hydrolysis to produce primary amines. However, this method cannot be used for aromatic primary amines as aryl halides do not undergo nucleophilic substitution ...

Nitrogen orbitals in amines are sp³ hybridized, leading to a pyramidal geometry. The fourth orbital of nitrogen contains an unshared pair of electrons.