This page provides guidance on naming organic molecules with alkyl substituents. An alkyl group is an alkane-derived substituent attached to a molecular structure to form a branched molecule. Alkyl gr...This page provides guidance on naming organic molecules with alkyl substituents. An alkyl group is an alkane-derived substituent attached to a molecular structure to form a branched molecule. Alkyl groups are named similarly to straight-chain alkanes. Several examples, such as methyl, ethyl, propyl, and butyl groups, are given, with condensed structures listed. The page further explains the IUPAC naming system, using a prefix, parent, and suffix.