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Classification of Haloalkanes and Haloarenes Compounds Containing sp 3 C—X Bond Alkyl halides or haloalkanes (R— X) Allylic halides Benzylic halides Compounds Containing sp 2 C—X Bond Vinylic halides Aryl halides
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,
They form a homologous series represented by C n H 2n+1 X. Where R’ = Alkyl group Compounds Containing sp 3 C—X Bond Alkyl halides or haloalkanes (R—X)
Allylic halides These are the compounds in which the halogen atom is bonded to an sp 3 -hybridised carbon atom next to carbon-carbon double bond (C=C) i.e. to an allylic carbon.
Benzylic halides These are the compounds in which the halogen atom is bonded to an sp 3 -hybridised carbon atom next to an aromatic ring.
These are the compounds in which the halogen atom is bonded to an sp 2 -hybridised carbon atom of a carbon-carbon double bond (C = C).
These are the compounds in which the halogen atom is bonded to the sp 2 -hybridised carbon atom of an aromatic ring.
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