Diethylamine reacts with nitrous acid to give

Options

A. `(C_(2)H_(5)) _(2)NH^(+)NO_(2)""^(-)`
B. `(C_(2)H_(5)) _(2)N NO`
C. `C_(2)H_(5)OH`
D. `N_(2)` and alcohol.

Explanation

To solve the problem of what diethylamine reacts with nitrous acid to give, we can follow these steps:

### Step 1: Understand the Reactants
Diethylamine is an organic compound with the formula \( (C_2H_5)_2NH \). Nitrous acid is represented as \( HNO_2 \).

### Step 2: Reaction Mechanism
When diethylamine reacts with nitrous acid, the nitrogen atom in diethylamine can be protonated by the nitrous acid, leading to the formation of a diazonium ion. The reaction can be summarized as follows:

1. **Protonation of Diethylamine**: The lone pair on the nitrogen of diethylamine accepts a proton from nitrous acid, forming a diethylammonium ion.
\[ (C_2H_5)_2NH + HNO_2 \rightarrow (C_2H_5)_2NH_2^+ + NO_2^- \]

2. **Formation of Diazonium Ion**: The nitrous acid can then react with the diethylammonium ion, leading to the formation of a diazonium ion.
\[ (C_2H_5)_2NH_2^+ + HNO_2 \rightarrow (C_2H_5)_2N^+ \equiv N + 2H_2O \]

### Step 3: Identify the Product
The product of this reaction is diethyl diazonium ion, represented as \( (C_2H_5)_2N^+ \equiv N \).

### Step 4: Conclusion
Thus, the reaction of diethylamine with nitrous acid results in the formation of diethyl diazonium ion.

### Final Answer
The product formed when diethylamine reacts with nitrous acid is diethyl diazonium ion, represented as \( (C_2H_5)_2N^+ \equiv N \).

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