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Functional Group Precedence in IUPAC nomenclature

Want to know which functional group has priority over others? Well, look here!

Functional Group Name Formula Suffix
(when highest precedence)
Prefix
(when lower precedence)
carboxyl -COOH -oic acid carboxy-
aldehyde -CHO -al formyl-
ketone -CO- -one oxo-
alcohol -OH -ol hydroxy-
amine -NH2 -amine amino-
ether -OR none alkoxy-
alkene C=C -ene en-
alkyne fg1.gif (889 bytes) -yne yn-
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