Question

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plz..... explain the definition of haloarenes,
monohalidearenes,
dihalidearenes,
trihalidearenes.
plz.... write all the definitions of arenes correct.

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Answer 1

When a hydrogen atom in an aliphatic or aromatic hydrocarbon is replaced by halogen atoms then the compounds are termed as haloalkanes and haloarenes. If a hydrogen atom is replaced from an aliphatic hydrocarbon by a halogen atom the resulting compound formed is called as haloalkane. It is also known as alkyl halide and halogenalkane.

However, if a hydrogen atom is replaced from an aromatic hydrocarbon by a halogen atom the resulting compound formed is known as haloarene. It is also known as aryl halide or halogenoarene. In a haloalkene (R – X), X represents halogen group. It is attached to an sp3 hybridized atom of an alkyl group whereas in haloarene (Ar – X) the halogen is attached to an sp2 hybridized atom of an aryl group.

Examples of Haloalkanes

Ethyl bromide − CH3CH2 − Br (sp3C)

haloalkanes

Examples of haloalkanes

Example of Haloarenes

Bromobenzene − C6H5Br (sp2C)

haloalkanes

Examples of haloarene

The key difference between haloalkanes and haloarenes is that haloalkanes are obtained from open-chain hydrocarbons (alkanes) whereas haloarenes are obtained from aromatic hydrocarbons (it is a type of hydrocarbon that forms a circular structure or ring-like structure due to sigma bonds and delocalized pi electrons between carbon atoms)

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