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What is the Action of Nitrous Acid on Primary Nitroalkane? - Chemistry

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What is the action of nitrous acid on primary nitroalkane?

 

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Solution

Reaction with nitrous acid: The reaction is used to distinguish between primary, secondary or tertiary nitroalkanes. With nitrous acid, α-hydrogen is replaced by nitroso group.

a. Primary nitroalkanes react with nitrous acid to form blue coloured nitroso-nitroalkanes (aci form) which on dissolution in sodium hydroxide gives red solution.

 

Concept: Amines - Identification of Primary, Secondary and Tertiary Amines
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