Preparation of Nitro Compounds and Properties

Preparation of Nitro Compounds Preparation and Properties

From Hydrocarbon :

Aromatic Nitro Compounds :

→ The mixture of conc. HNO3 + conc. H2SO4 is known as nitrating mixture.

Step – I :

Preparation of Nitro Compounds and Properties 1
Preparation of Nitro Compounds and Properties 2

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Step – II :

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Step – III :

H3O+ + HSO4 → H2O + H2SO4

→ From Aliphatic Nitro Compounds : Alkane in vapour phase reacts with fuming HNO3 at 673 K temperature gives a mixture of different nitro alkanes.

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From Alkyl Halides :

→ Alkyl bromide or alkyl iodide reacts with AgNO2 with a1coho forms nitroalkane.

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→ This method is not used for preparation of aromatic nitro compound because aromatic compounds are less reactive for nucleophilic substitution.

→ Silver Nitrite (AgNO2) is a covalent compound hence lone pair of electron present on nitrogen is available for attack. Therefore nitroalkanes are formed as main product.

Preparation of Nitro Compounds and Properties

→ From Aniline : By diazotization of aniline by nitrous acid (NaNO2 + HCl) a salt is obtained which then react with aqueous sodium nitrite mixed with copper powder to form nitrobenzene.

Preparation of Nitro Compounds and Properties 8

Chemistry Notes

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