What type of reaction occurs when an amine reacts with a nitrous acid?

What type of reaction occurs when an amine reacts with a nitrous acid?

Step 1: Identify the reactants. An amine is a compound that contains a nitrogen atom bonded to hydrogen atoms or carbon atoms. Nitrous acid is a weak acid with the formula HNO2.
Step 2: Understand the reaction type. When an amine reacts with nitrous acid, it undergoes a process called diazotization.
Step 3: Describe diazotization. In diazotization, the amine is converted into a diazonium salt, which contains a positively charged nitrogen group (N2+).
Step 4: Write the general reaction. The general reaction can be represented as: R-NH2 (amine) + HNO2 (nitrous acid) → R-N2+ (diazonium salt) + H2O (water).
Step 5: Conclude the reaction. The final product is a diazonium salt, which can be used in further chemical reactions.

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