What is the difference between amino groups and amine?

An amino group refers to a specific functional group (-NH2) that contains a nitrogen atom bonded to two hydrogen atoms. It is commonly found in organic molecules, particularly amino acids, which are the building blocks of proteins. Amino groups can participate in various chemical reactions, including condensation reactions to form peptide bonds in proteins.

On the other hand, "amine" is a broader term referring to compounds that contain a functional group derived from ammonia (NH3) by replacing one or more hydrogen atoms with organic substituents. Amines can be primary (one substituent), secondary (two substituents), or tertiary (three substituents) depending on the number of organic substituents attached to the nitrogen atom. Amino groups are a specific type of amine, specifically referring to the NH2 functional group, which is a primary amine. Other examples of amines include methylamine (CH3NH2), dimethylamine (CH3)2NH, and trimethylamine (CH3)3N.