Classification Of Amines

Amines are classified as primary, secondary (or) tertiary according to the number of groups attached to the nitrogen atom. If one alkyl group has replaced one hydrogen atom of ammonia, it is primary amine. Similarly, if two hydrogens are replaced, it is secondary amine and if all the three are replaced, it is tertiary amine.

We can also replace all the 4 hydrogens in NH₄⁺ with alkyl groups to get a quaternary tetra alkyl ammonium ion.