Q72 of 97 Page 142

How will you obtain monobromobenzene from aniline?

Monobromobenzene can be prepared from aniline, C6H5NH2 by Sandmeyer’s reaction. When aniline suspended in cold mineral acid is treated with sodium nitrite, a diazonium salt is formed. Mixing the diazonium salt with cuprous bromide results in replacement of the diazonium ion by –Br, forming monobromobenzene.


More from this chapter

All 97 →
70

What are the IUPAC names of the insecticide DDT and benzenehexachloride? Why is their use banned in India and other countries?

 71

Elimination reactions (especially b-elimination) are as common as the nucleophilic substitution reaction in case of alkyl halides. Specify the reagents used in both cases.

 73

Aryl halides are extremely less reactive towards nucleophilic substitution. Predict and explain the order of reactivity of the following compounds towards nucleophilic substitution from arylhalides?

(I)



(II)



(III)



 74

tert-Butylbromide reacts with aq. NaOH by SN1 mechanism while n-butylbromide reacts by SN2 mechanism. Why?