<Tr> <Th> Chemical class </Th> <Th> Group </Th> <Th> Formula </Th> <Th> Structural Formula </Th> <Th> Prefix </Th> <Th> Suffix </Th> <Th> Example </Th> </Tr> <Tr> <Td> Amide </Td> <Td> Carboxamide </Td> <Td> RCONR </Td> <Td> </Td> <Td> carboxamido - or carbamoyl - </Td> <Td> - amide </Td> <Td> Acetamide (Ethanamide) </Td> </Tr> <Tr> <Td> Amines </Td> <Td> Primary amine </Td> <Td> RNH </Td> <Td> </Td> <Td> amino - </Td> <Td> - amine </Td> <Td> Methylamine (Methanamine) </Td> </Tr> <Tr> <Td> Secondary amine </Td> <Td> R NH </Td> <Td> </Td> <Td> amino - </Td> <Td> - amine </Td> <Td> Dimethylamine </Td> </Tr>

Which is the only functional group of organic molecules that contains nitrogen