What type of compounds contain both amine and phenolic groups?

Compounds that contain both amine and phenolic groups are classified as amphoteric bases. This classification stems from the presence of both functional groups, which impart distinct chemical properties to the compound. Amines, being basic due to the presence of a nitrogen atom with a lone pair of electrons, can donate a proton in a chemical reaction, while phenolic groups, which include a hydroxyl (-OH) attached to a benzene ring, can act as weak acids.

In amphoteric behavior, a compound can react both as an acid and as a base, depending on the conditions of the reaction and the other substances present. When an amine is involved, the compound's ability to accept protons further emphasizes its basic properties. Simultaneously, the phenolic group allows it to participate in acid-base reactions, thereby displaying both acid and base characteristics.

Weak acids and strong acids, on the other hand, are defined primarily by their ability to donate protons in solution, whereas neutral compounds do not significantly donate or accept protons. Thus, the correct classification of compounds containing both amine and phenolic groups as amphoteric bases captures their dual ability to act as both acids and bases in various chemical contexts.