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Haloalkanes And Haloarenes

Question
CBSEENCH12008010
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Explain the reason for the following:

Halogens delocalize electrons in the benzene ring in the order F > Cl > Br > I.

Solution

i)Delocalization of electron in the benzene ring is in the order of  F > Cl > Br > I because greater the ability of electronegtivity more is possibilty of electrophillic reaction. Fluorine is most electrongetive element in halogens due to small in size. Hence, it delocalize more electron then others. 
ii) As the size increase electronegtivity decrease thus, Iodine is least electronegtive.

Some More Questions From Haloalkanes and Haloarenes Chapter

Write structures of the following compounds:
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1-chloro-4-ethylcyclohexane

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4-tert-Butyl-3-iodohaptane

Write structures of the following compounds:
1, 4-Dibromo but-2-ene

Write structures of the following compounds:
1-Bromo-4-sec butyl-2-methyl benzene.

Why is sulphuric acid not used during the reaction of alcohols with KI?

Write structures of different dihalogen derivatives of propane.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:

i) A single monochloride.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:

i)Three isomeric monochlorides.

Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields:
Four isomeric monochlorides.

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