What are the functional groups of caffeine?


Quick Answer

The functional groups present in caffeine are amines, amides and an alkene group. By comparing a list of functional groups to the structure of caffeine, it is possible to find one alkene, two amides and two amines.

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Full Answer

The four nitrogen atoms in the caffeine molecule result in either amines or amide groups depending on whether or not they are bound to a carbonyl, which is a carbon atom with a double bond to an oxygen atom. Amine groups consist of any carbon atom bound to a nitrogen, as long as the carbon atom is not part of a carbonyl, in which case these are amides. Alkenes are two carbon atoms with a double bond between them, which can be seen at the point where the two rings of caffeine meet.

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