What is the most important chemical property of amines?

The most important chemical property of amines is that they are weak bases.

Explanation:

The general form of amines is R-NH2. they have atoms of nitrogen bonded to atoms of carbon and two, one or none atoms of hydrogen.

The atom of nitrogen has a lone pair of electrons. The lone pair of electrons makes that the chemical behavior of amines is similar to ammonia (NH3) and explains their basic nature.