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Haloalkanes And Haloarenes

Question
CBSEENCH12010792
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Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

  • mixture of o− and p−bromotoluenes

  • mixture of o− and p−dibromobenzenes

  • mixture of o− and p−bromoanilines

  • mixture of o− and m−bromotoluenes

Solution

A.

mixture of o− and p−bromotoluenes


First, sulphonationis the means to block para position and to reduce the reactivity of phenolic ring against strong oxidising agent HNO3. (The use of conc. HNO3 over phenol cause the oxidation of ring mainly). The strong acidic medium in second step cause desulphonation also.

Some More Questions From Haloalkanes and Haloarenes Chapter

Write structures of the following compounds:
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.

Draw the structures of major monohalo products in each of the following reactions:

Draw the structures of major monohalo products in each of the following reactions:

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