# Overview of Amines

Amines are compounds that contain a nitrogen atom singly bonded to one or more alkyl groups. They are designated as primary, secondary, or tertiary by how many R groups are bonded to the nitrogen.
An amine is an organic compound that is a derivative of ammonia (NH3), where one or more hydrogen atoms are replaced by alkyl or aryl units (R), forming ${\rm{N{-}R}}$ single bonds. Amines are classified as primary, secondary, tertiary, or quaternary. A primary amine is an organic compound that is a derivative of ammonia (NH3), where an alkyl or aryl unit (R) replaces one hydrogen atom, forming an ${\rm{N{-}R}}$ single bond. A secondary amine is an organic compound that is a derivative of ammonia (NH3), where alkyl or aryl units (R) replace two hydrogen atoms, forming ${\rm{N{-}R}}$ single bonds. A tertiary amine is an organic compound that is a derivative of ammonia (NH3), where alkyl or aryl units (R) replace three hydrogen atoms, forming ${\rm{N{-}R}}$ single bonds. A quaternary amine is an organic compound that is a derivative of ammonia (NH3), where alkyl or aryl units (R) replace three hydrogen atoms and the lone pair of electrons. An ammonium cation is a cation with the chemical formula NH4+ that is formed from the protonation of ammonia (NH3).

#### Types of Amines

In IUPAC nomenclature, primary amines are named by replacing the -ane of the alkyl group with -anamine, which is preceded by a number to identify the location. Secondary amines are named based on the longer of the two groups attached to the nitrogen. The smaller group is preceded by an N-. Tertiary amines are named similarly, with the two smaller groups both preceded by N-. If a higher-priority group is in the structure, the amine is named as a substituent with a number indicating its location and given the name amino.

#### IUPAC Naming of Amines

Amines are used extensively in medicine, such as ephedrine, and have plenty of uses in biochemistry and industrial processes, such as making dyes.