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CBSE Class 12 Chemistry Notes: Amines – Methods of Prepration of Nitro Compounds

by Neepur Garg
April 22, 2019
in 12th Class, Class Notes
Reading Time: 1min read
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Methods of Preparation:

(i) From alkyl halides:

Alkyl halides react with silver nitrite in ethanolic solution to give nitro compounds. Alkyl nitrite is formed in minor quantity. This reaction is used to prepare 1 deg nitro compounds primarily while 2 deg and 3 deg halides give major proportion of alkenes due to β – elimination. Contrary to this alkali nitrites give alkyl nitrites as major product. This is due to ionic nature of alkali nitrite. But if the reaction is carried out in solvents like DMF or DMSO, then even NaNO2 or KNO2 give good yield (about 60%) of nitro compound.


(ii) Nitration:

Nitro derivatives of aromatic compounds like nitrobenzene are produced when benzene is allowed to react with nitrating mixture. (conc. HNO3 / conc. H2SO4).

Mechanism:


(iii) From amines:

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Neepur Garg

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