1. Classification of Haloalkanes and Haloarenes

2. Classification of Haloalkanes and Haloarenes
Compounds Containing sp3 C—X Bond
Alkyl halides or haloalkanes (R—X)
Allylic halides
Benzylic halides
Compounds Containing sp2 C—X Bond
Vinylic halides
Aryl halides

3. On the Basis of Number of Halogen Atoms
These may be classified as mono, di, or polyhalogen (tri-,tetra-, etc.)
compounds depending on whether they contain one, two or more halogen atoms in their structures. For example,

4. Compounds Containing sp3 C—X Bond
Alkyl halides or haloalkanes (R—X)
They form a homologous series represented by CnH2n+1X.
Where R’ = Alkyl group

5. Allylic halides
These are the compounds in which the halogen atom is bonded to an sp3-hybridised carbon atom next to carbon-carbon double bond (C=C) i.e. to an allylic carbon.

6. Benzylic halides
These are the compounds in which the halogen atom is bonded to an sp3-hybridised carbon atom next to an aromatic ring.

7. Compounds Containing sp2 C—X Bond
(i) Vinylic halides
These are the compounds in which the halogen atom is bonded to an sp2-hybridised carbon atom of a carbon-carbon double bond (C = C).

8. Compounds Containing sp2 C—X Bond
Aryl halides
These are the compounds in which the halogen atom is bonded to the sp2-hybridised carbon atom of an aromatic ring.