What will be the final product in the following reaction sequence? `CH_3CH_2CN overset(H^(+)//H_2O)to A underset(Delta)overset(NH_3)to B overset(NaOBr)to C `

Options

A. `CH_(3)CH_(2)CONH_(2)`
B. `CH_(3)CH_(2)COBr`
C. `CH_(3)CH_(2)NH_(2)`
D. `CH_(3)CH_(2)CH_(2)NH_(2)`

Answer

To determine the final product of the given reaction sequence, let's break down each step systematically.

1. **Starting Material**: The reaction begins with `CH_3CH_2CN`, which is ethyl cyanide (or ethyl nitrile).

2. **First Step**: The reaction of ethyl cyanide with `H^(+)//H_2O` indicates an acid-catalyzed hydrolysis. This process converts the nitrile group (-C≡N) into a carboxylic acid.
- **Product A**: The product of this step is ethanoic acid (or acetic acid), represented as `CH_3COOH`.

3. **Second Step**: The product A (ethanoic acid) is then heated (indicated by `Δ`) with ammonia (`NH_3`). This reaction leads to the formation of an amide.
- **Product B**: The product of this step is ethylamide (or acetamide), represented as `CH_3CONH_2`.

4. **Third Step**: The amide (Product B) is then treated with `NaOBr`, which is a reagent used in the Hofmann degradation reaction. This reaction results in the loss of one carbon atom from the amide.
- **Product C**: The final product after this reaction is ethylamine (`CH_3CH_2NH_2`).

Thus, the final product C of the reaction sequence is ethylamine.

### Final Product: Ethylamine (CH₃CH₂NH₂)

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