Subordinate Functional Groups
(always named as substituents according to IUPAC rules)


Characteristic
group
Prefix Non-IUPAC
class name

-Br Bromo alkyl halide
-Cl Chloro alkyl halide
-ClO Chlorosyl
-ClO2 Chloryl
-ClO3 Perchloryl
-F Fluoro alkyl halide
-I Iodo alkyl halide
-IO Iodosyl
-IO2 Iodyl
=N2 Diazo diazoalkane
-N3 Azido azide
-NO Nitroso
-NO2 Nitro
-OR R-oxy ether
-SR R-thio sulfide


Adapted from Sections A, B and C of IUPAC "Blue Book," Nomenclature of Organic Chemistry, Sections A, B, C, D, E, F, and H, Pergamon Press, Oxford, 1979. Copyright 1979 IUPAC.