What Are Amines?
Derivatives of ammonia (NH 3 in which one or more H are replaced by
alkyl or aryl groups
Classified as 1°, 2°, or 3° depending on number of H atoms of ammonia
that are replaced
The 3 atoms / groups bonded to the N in amines assume a trigonal
Aliphatic Amine: amine in which N is bonded only to alkyl groups
Aromatic Amine: amine in which N is bonded to one or more aryl groups
Heterocyclic Amine: amine in which N is one of the atoms of a ring
Heterocyclic Aromatic Ring: amine in which N is one of the atoms of an
What Are The Characteristic Physical Properties Of Amines?
Amines are polar compounds, both primary and secondary amines form
intermolecular H bonds
All classes of amines form H bonds with water and are more soluble in
What Are The Acid-Base Properties Of Amines?
Like ammonia, all amines are weak bases
All aliphatic amines have about the same base strength and are slightly
stronger bases than ammonia
Aromatic amines and heterocylic aromatic amines are considerably
weaker bases than are aliphatic amines due to resonance interaction
EWG decrease basicity of substituted aromatic amines by decreasing