3. Prefix

Prefix gives the locations of the other functional groups (other than
the principal functional group) on the stem.

o Prefix is used to denote any substituent in an organic compound.
o Placed in alphabetical order if there is more than 1 prefix.
o For multiple prefix, use di, tri, etc

Substituent Group Name as Prefix
\(-CH_3\) Methyl-
\(-C_2H_5\) Ethyl-
\(-C_3H_7\) Propyl-
\(-C_4H_9\) Butyl-

Substituent Group Name as Prefix
\(-F\) Fluoro-
\(-Cl\) Chloro-
\(-Br\) Bromo-
\(-I\) Iodo-

Substituent Group Name as Prefix
\(-OH\) Hydroxy-
\(-NO_2\) Nitro-
\(-NH_2\) Amino-
\(-C_6H_5\) Phenyl-
\(-CN\) Cyano-