A secondary amine is a type of amine in which a nitrogen atom is bonded to two carbon atoms and one hydrogen atom. This structure allows secondary amines to participate in various chemical reactions, making them important in organic chemistry. They can be found in many natural and synthetic compounds, including pharmaceuticals and dyes. Secondary amines can be classified based on the carbon chains attached to the nitrogen. Common examples include diethylamine and pyrrolidine. Their unique properties, such as basicity and nucleophilicity, make them useful in various applications, including catalysis and as intermediates in chemical synthesis.