What are alkyl, aryl, aliphatic and aromatic groups?

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Answer 1 · 2016-10-22T21:02:34

They are different types of organic side groups.

Alkyl $-$ $-$ a side group consisting of carbon and hydrogen atoms only, eg., ${CH}_{3}, C_{2} H_{5}$ $"CH"_3, "C"_2"H"_5$ etc.
Aryl $-$ $-$ a side group consisting of an aromatic ring, usually benzene, eg., $C_{6} H_{5} C_{2} H_{5} OH$ $"C"_6"H"_5"C"_2"H"_5"OH"$
Aliphatic - any side group that doesn't have an aromatic ring in it
Aromatic - a side group which is the same as an aryl side group $-$ $-$ although some sources state that an aromatic group is derived only from benzene whilst an aryl group comes from any univalent organic radical.